Tim's 7Th Grade Science

Front 1

cell

Back 1

Basic unit of structure and function in a living thing.

Front 2

structure

Back 2

An organisms body plan, or how it is arranged.

Front 3

function

Back 3

The process the organism carries out.

Front 4

nucleus

Back 4

The control center that directs the cell's activities. It contains the information that determines the cell's characteristics.

Front 5

tissue

Back 5

A group of similar cells that perform the same function.

Front 6

Name the 4 different types of tissue.

Back 6

Muscle tissue
nerve tissue
connective tissue
epithelial tissue

Front 7

nerve tissue

Back 7

Carries messages back and forth between the brain and the every part of the body.

Front 8

connective tissue

Back 8

provides support for the body and connects all its parts.

Front 9

epithelial tissue

Back 9

covers the surfaces of the body, inside and out.

Front 10

organ

Back 10

a structure that is composed of different kinds of tissue, and has a specific function.

Front 11

organ system

Back 11

A group of organs that work together to perform a major function.

Front 12

homeostasis

Back 12

The body's tendency to keep things in balance, in spite of changes in the external environment.

Front 13

stimulus

Back 13

Something inside or outside an organism's body that causes the organism to react.

Front 14

response

Back 14

The action or change in behavior that occurs as the result of a stimuls.

Front 15

stress

Back 15

The reaction of your body and mind to threatening, challenging, or disturbing events.

Front 16

What are the 5 major functions of the skeletal system?

Back 16

1. It provides shape and support.
2. Enables you to move.
3. Protects your internal organs
4. Produces blood cells
5. Stores certain materials until your body needs them.

Front 17

vertebrae

Back 17

The bones that make up your backbone.

Front 18

marrow

Back 18

Soft, connective tissue inside the bone.

Front 19

cartilage

Back 19

Connective tissue that is more flexible than bone.

Front 20

joint

Back 20

A place in the body where 2 bones come together. Joints allow the bones to move in different ways.

Front 21

What are the 4 kinds of movable joints?

Back 21

ball and socket
pivot
hinge
gliding

Front 22

osteoporosis

Back 22

A condition in which the body's bones become weak and break easily.

Front 23

involuntary muscles

Back 23

Muscles not under our control.

Front 24

voluntary muscles

Back 24

Muscles under our control.

Front 25

Name the 3 types of muscle.

Back 25

skeletal
smooth
cardiac

Front 26

skeletal muscles

Back 26

Muscles attached to the bones.

Front 27

tendon

Back 27

A strong connective tissue that attaches muscle to bone.

Front 28

smooth muscle

Back 28

Involuntary muscles found inside many internal organs.

Front 29

cardiac muscle

Back 29

Involuntary, but striated muscle found in the heart. Unlike skeletal muscles it does not get tired.

Front 30

What are the 5 functions of the skin?

Back 30

1. It protects the body from injury and infections.
2. Helps to regulate body tempurature.
3. Eliminates waste.
4. Gather information about the environment.
5. Produce Vitamin D

Front 31

Name the 2 main layers of the skin.

Back 31

Epidermis
Dermis

Front 32

Epidermis

Back 32

The outside layer of the skin

Front 33

melanin

Back 33

A pigment, or colored substance that gives color to the skin.

Front 34

dermis

Back 34

the lower layer of the skin.

Front 35

pores

Back 35

openings in the skin

Front 36

follicles

Back 36

Strands of hair grow out of this skin structure.

Front 37

cancer

Back 37

Disease in which some cells divide uncontrollably.