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108 Cards in this Set

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Anatomy

Structure of the body

Physiology

The function of the body

Homeostasis

The state of balance in your body

Surface anatomy

The study of general form and superficial markings

Regional anatomy

Focuses on the anatomical organization of specific areas of the body, such as head, neck, or trunk.

Systematic anatomy

The study of the structure of organsystems

Clinical anatomy

Subspecialties in an important clinical practice

Developmental anatomy

Describes the changes in form that take place between conception and adulthood.

Embryology

The study of early developmental processes (during the first two months)

Cytology

The study of the internal structure of individual cells.

Histology

The examination of tissues

Cells

The simplest units of life.

Tissues

Groups of specialized cells and cell products that work together to perform specific functions


Pathology

Study of disease

Signs (displays signs of fever)

An objective disease indications like a fever

Symptoms (patient display symptoms of fever)

A subjective disease indications such as tiredness

Atoms

The smallest stable units of matter

System levels in order

Cell


Tissue


Organ


Organ system


Organism


Part 1 of Homeostasis regulation

Autoregulation: process that occurs when a cell, a tissue, an organ, or an organ system adjusts in response to some environmental change.

Example when oxygen levels decline in a tissue, the cells release chemicals that widen, or dilate, blood vessels.

Extrinsic regulation

There is a process that results from the activities of the nervous system and endocrine system. These organ systems detect environmental change and send an electrical signal nervous system for chemical messenger endocrine system to control or adjust the activities of another or many other systems simultaneously

When you exercise your nervous system issues commands that increase your heart rate so that blood will circulate faster your nervous system also reduces blood flow to less active organs such as the digestive tract the oxygen in circulating blood is it available to the active muscles which need it most

What does the nervous system do?

The nervous system directs rapid short-term and very specific responses.

For example when you touch a hot stove the heat produces a painful localized disturbance of homeostasis and your nervous systems response they ordering specific muscles to contract and pull away from the stove

What does the endocrine system do?

The endocrine system releases chemical Messengers called hormones into the bloodstream

Hormones

Hormones are molecular Messengers that can affect tissues and organs throughout the body

What are the three parts of homeostatic regulatory mechanisms?

1. Receptor


a) a receptor is a sensor that is sensitive to a particular stimulus or environmental change


2. Control center


a) the control Centre receives and processes information supplied by the receptor and sends out commands


3. Effector


a) an effector is a cell or organ that responds to the commands of the control center and whose activity either opposes or enhances the stimulus.

Set point

Desired value

Integumentary

Major organs



Skin, hair, sweat glands,



FUNCTIONS



1) Protects against environmental hazards,


2) helps regulate body temperature, 3)provide sensory information


Skeletal system

Major organs



Bones, cartilage, associated ligaments, bone marrow



FUNCTIONS


1)Provides support and protection for other tissues,


2) stores calcium and other minerals, 3) forms blood cells

Muscular

Major organs


skeletal muscles and associated tendons



FUNCTIONS


1) provides movement


2) provides protection and support for other tissues


3) generates heat that maintains body temperature

Nervous system

Major Organs


Brain, spinal cord, peripheral nerves, sense organs



FUNCTIONS


1) directs immediate responses to stimuli


2) coordinates or moderates activities of other organ systems


3) provides and interprets sensory information about external conditions

Endocrine system

Major organs


Pituitary gland, thyroid gland, pancreas, adrenal gland, gonads, endocrone tissues in other systems


FUNCTIONS


1) direct long-term changes in the activities of other organ systems


2) adjusts metabolic activity and energy used by the body


3) controls many structural and functional changes during development

Cardiovascular System

Major organs


Heart, blood, blood vessels


FUNCTIONS


1) distributes blood cells, water and dissolved materials including nutrients, waste products, oxygen, and carbon dioxide


2) distributes heat and assists in control of body temperature

Lymphatic System

Major organs


Spleen, thymus, lymphatic vessels, lymph nodes, and tonsils


FUNCTIONS


1) defends against infection and disease


2) returns tissue fluids to the bloodstream

Respiratory System

Major organs


Nasal cavities, sinuses, larynx, trachea, bronchi, lungs, alveoli


FUNCTIONS


1) delivers air to alveoli ( sites in lungs where gas exchange occurs)


2) provides oxygen to bloodstream


3) removes carbon dioxide from bloodstream


4) produces sounds for communication

Digestive systems

Major organs


Teeth, tongue, pharynx, esophagus, stomach, small intestine, large intestine, liver, gallbladder, pancreas


FUNCTIONS


1) processes and digest food


2) absorbs and conserves water


3) absorbs nutrients


4) stores energy Reserves


Urinary system

Major organs


Kidneys, ureters, urinary bladder, urethra


FUNCTIONS


1) excrete waste products from the blood


2) controls water balance by regulating volume of urine produced


3) stores Urine prior to voluntary elimination


4) regulates blood ion concentrations and pH

Male reproductive system

Major organs


Testes, epididymides, Ductus deferentia, seminal vesicles, prostate gland, Penis, scrotum.


FUNCTIONS


1) produces male sex cells (sperm), seminal fluids, and hormones.


2) Sexual Intercourse

Female reproductive system

Major organs


Ovaries, uterine tubes, uterus, vagina, labia, clitoris, mammary glands


FUNCTIONS


1) produces female sex cells (oocytes) and hormones


2) supports developing embryo from conception to delivery


3) provides milk to nourish newborn infant


4) Sexual Intercourse

The control of room temperature

Negative feedback

A way to counteracting a change.

Example: in thermo regulation, the relationship between heat loss, which takes place mainly at the body surface, and heat production, which takes place in all active tissues, is altered.

What is the control center for homeostasis?

The hypothalamus, a region of the brain.

Where does the hypothalmus control center get information?

Two sets of temperature receptors


1) in the skin


2) within the hypothalamus

Negative feedback: control of body temperature

In negative feedback, a stimulus produces a response that opposes or negates the original stimulus.

Vessels diagram (not a definition)

What 2 things happen when body temperature rises above 37.2 celsius? (98.6 Fahrenheit)

1) muscle tissue lining the walls of blood vessels supplying blood to the skin and sweat glands


2) the muscle tissue relaxes so the blood vessels dilate (widen), increasing blood flow through vessels near the body surface, and the sweat glands speed up their secretion of sweat. The skin then acts like a radiator by losing heat to the environment, and the evaporation of sweat speeds the process.

In homeostasis, what happens when body temperature regulates?

1)The hypothalamus declines, and the thermo regulatory control center becomes less active.


2) Blood flow to the skin and sweat gland activity then decrease to previous levels.


3)Body temperature drops below the set point as the secreted sweat evaporates.

What is the primary mechanism for homeostasis

Negative feedback

Negative feedback

A variation outside the set point triggers an automatic response that corrects the situation. Minimizes change.

Positive feedback

Increase the change that triggered it. Example giving birth

Negative feedback: control of body temperature (label the cycle)

What reasons does temperature vary?

1) small fluctuations around the set point


2) changes in the set point

What determines homeostatic set points?

Genetic factors, age, gender, general health, and environmental conditions.

When do positive feedback loops occur?

When a potentially dangerous or stressful process must be completed quickly to restore homeostasis. Example, a severe cut and having loss of blood which lowers blood pressures and reduces the efficiency of the heart

Positive feedback blood clotting

Roles of organ systems in homeostatic regulation

Superficial anatomy

On the surface

Frontal

Forehead

Nasal

Nose

Ocular or orbital

Eye

Otic

Ear

Buccal

Cheek

Cervical

Neck

Cephalic

Head

Cranial

Skull

Facial

Face

Oral

Mouth

Mental

Chin

Axillary

Armpit

Thoracic

Chest or thorax

Mammary

Breast

Brachial

Arm

Antecubital

Front of elbow

Antebrachial

Forearm

Carpal

Wrist

Abdominal

Abdomen

Umbilical

Navel

Pelvic

Pelvis

Acromial

Shoulder

Dorsal

Back

Olecranal

Back of elbow

Lumbar

Loin

Gluteal

Buttock

Popliteal

Back of knee

Sural

Calf

Palmar

Palm

Pollex

Thumb

Digits

Phalanges or fingers

Patellar

Knee cap

Inguinal

Groin

Pubic

Pubis

Femoral

Thigh

Crural

Leg

Calcaneal

Heel of foot

Plantar

Sole of foot

Tarsal

Ankle

Hallux

Great toe

Pedal

Foot

Supine

Face up

Prone

Face down

What are the abdominopelvic quadrants?

Right upper right lower left upper left lower

What are the 9 abdominopelvic regions?

Right and left hypochondriac


Right left lumbar


Right lwft inguinal


Epigastric


Umbilical


Hypogastric

Anatomical relationships

Frontal plane

Sagittal plane

Pleural cavities

Hold the lungs

Visceral pleura

Covers the outer surfaces of a lung

Parietal pleura

Covers the mediastinal surface and the inner body wall

What does the mediastinum consist of?

A mass of connective tissue that surrounds, stabilizes, and supports the esophagus, trachea, and thymus, as well as the major blood vessels that originate or end at the heart.

Pericardial cavity

A small chamber that surrounds the heart.