Organisation in Animals Flashcards
1
Q
What are the five levels of organisation in animals?
A
- Cells
- tissues
- Organs
- Organ systems
- Organisms
2
Q
What is made in the pancreas?
A
Enzymes such as amylase, lipase and protease
3
Q
What does the liver make?
A
Bile
4
Q
What does Bile do?
A
Neutralises the hydrochloric acid in the stomach and emulsifies fat to small droplets.
5
Q
What happens to air when you breath in?
A
- Into the body through nose and mouth
- Down the trachea
- Into the bronchi
- Through the bronchioles
- Into the alveoli
6
Q
What is the blood made up of?
A
- Red blood cells - Binds to oxygen
- Plasma- transports substances and blood cells around the body
- Platelets- form blood clots to protect against infection
- White blood cells
7
Q
What do arteries do?
A
Carries blood away from the heart (high pressure)
8
Q
What is the structure of an artery?
A
- Thick muscular cell wall
- The walls can stretch to withstand high pressure
- Small lumen
9
Q
What do Veins do?
A
Carries blood to the Heart
10
Q
What is the structure of a Vein?
A
- Have valves to stop blood flowing the wrong way
- Thin walls
- Large lumen
11
Q
What do Capplaries do?
A
- Carries blood to tissues and cells
- Connects arteries and veins
12
Q
What is the structure of a Cappilary?
A
- One cell thick (short diffusion distance for substances to move to the blood)
- Very narrow lumen
13
Q
What does the Vena Cava do?
A
Brings deoxygenated blood to the heart
14
Q
What does the Right ventricle do?
A
Pumps blood into the lungs
15
Q
What does the left ventricle do?
A
Pumps blood around the body
