Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
34 Cards in this Set
- Front
- Back
|
Excretory System |
The breakdown of protein into nitrogen-containing wastes |
|
|
Excretory System of a HYDRA |
Occurs through diffusion through the epidermis |
|
|
Excretory System of a PLANARIAN |
Tubular system. Flame cells filter ammonia. The ammonia filters through the tubes and exit through the skin. |
|
|
Excretory System of a VINEGAR EEL |
Occurs through diffusion through the epidermis |
|
|
Excretory System of an EARTHWORM |
1. Wastes from blood turn ammonia into urea. 2. Nephrostome pushes waste into the nephridia. 3. Wastes go out through the Nephridiopore. |
|
|
Respiratory System |
All tissues need oxygen and produce carbon dioxide. |
|
|
Diffusion |
Gases move from high to low. Membranes must be thin, moist and have a large surface area. |
|
|
Respiratory System of a HYDRA |
Occurs by diffusion through the epidermis. |
|
|
Respiratory System of a PLANARIAN |
Diffusion through epidermis. |
|
|
Respiratory System of a VINEGAR EEL |
Uses diffusion |
|
|
Respiratory System of an EARTHWORM |
Diffusion through wet skin |
|
|
Open Circulatory System |
Blood only partially contained in tubes. Not very efficient. |
|
|
Closed Circulatory System |
Blood circulates in blood vessels. |
|
|
Single-loop circulation |
One Heart (atria, ventricle) |
|
|
Double-loop circulation |
2 loops - one to lungs, on to body |
|
|
Circulatory System of a HYDRA |
No circulatory system because cells are in contact with water which contains oxygen and nutrients. Diffusion circulates the oxygen, nutrients, and waste products in and out of the hydra. |
|
|
Circulatory System of a PLANARIAN |
None. Circulates nutrients through diffusion. |
|
|
Circulatory System of a VINEGAR EEL |
No circulatory system. Uses diffusion |
|
|
Circulatory System of an EARTHWORM |
Closed circulatory system. Circulates blood through vessels. Aortic arches pump blood into dorsal/ventral blood vessels. Counterclockwise circulation. |
|
|
Digestive System |
Breaks down food into nutrient that can be digested. |
|
|
Intracellular digestion |
"In the cell" individual cells digest food and pass it on to other cells. |
|
|
Extracellular digestion |
Food broken down outside of cells using gastrovascular cavities and the digestive tract. |
|
|
Digestive System of a HYDRA |
1. Mouth is the opening to the gastrovascular cavity, which is lined with flagella. 2. Flagella mixes food and is absorbed into the lining. 3. Digestion occurs in the food vacuoles of the lining cells and the nutrients are diffused throughout the body 4. Undigested food comes back out through the mouth. |
|
|
Digestive System of a PLANARIAN |
Two way digestive tract. 1. Pharynx connects mouth to gastrovascular cavity. 2. Food is digested by lining cells, which diffuses nutrients to the rest of the body |
|
|
Digestive System of a VINEGAR EEL |
One way digestive tract. 1. Food gets broken down and nutrients are absorbed. 2. Goes into intestine, waste is removed through the anus. |
|
|
Digestive System of an EARTHWORM |
1. Pharynx secretes mucus that makes food move to the esophagus. 2. Crop stores food. 3. Gizzard grinds food and food is absorbed into blood. 4. Undigested waste is removed through the anus. |
|
|
Cnidocytes |
Cells that cause tentacles to sting |
|
|
Nematocyst |
Barbs in Cnidocytes |
|
|
Mesoglea |
Jelly layer between two cell layers |
|
|
Auricle |
Structure that resembles an ear on a Planarian. Used to sense touch and chemicals. |
|
|
Ocelli |
Eyespots that help the Planarian see light |
|
|
Male Genital pores |
Segments 15 and 26 |
|
|
Female genital pores |
Segment 14 |
|
|
Seminal receptacles |
Segments 9-11 |
