Circulation Flashcards
1
Q
Earthworms
A
- Have 5 aortic arches
- Have closed circulation
2
Q
Grasshoppers/insects
A
- Have hemolymph instead of blood
- have open circulation (no blood vessels)
- have 7 chambered pumps
3
Q
Fish
A
- Closed circulation
- 2 chambered hearts
- have gills which is where 02 & C02 exchange (no lungs)
4
Q
Amphibians (ex: frog)
A
- Closed circulation
- They have oxygenated and deoxygenated blood mixed in their ventricles
- Breath through their skin and glottis too
5
Q
Birds/mammals
A
- Closed Circulation
- both have 4 chambered hearts
6
Q
General functions of blood
A
- Distribution
- Absorption of nutrients
- Delivery of nutrients to the liver
- Removal of waste (ex: uric acid)
- Transport of hormones to target cells
7
Q
Red blood cells
A
- Come from red bone marrow
- Don’t have a nucleus (dead)
- Carry O2 & CO2
- Make up most cells in blood
8
Q
White blood cells
A
- Originate from red bone marrow
- Fight off infections by engulfing some pathogens or creating antibodies to fight infections
9
Q
Platelets
A
- Pieces of red blood cells
- They stick to injuries
- Form blood clots
- Patch up damaged vessels
10
Q
Plasma
A
- Makes up most of blood
- Carries blood proteins
- Assists transport
11
Q
Blood proteins
A
- Maintains blood pressure
- makes up antibodies
- makes fibrin for clotting
12
Q
Arteries and arterioles
A
- Away from heart
- Arterioles are smaller in diameter than arteries
- High O2 and low CO2
- They expand and contract as blood is pumped
- High pressure
- Very muscular
13
Q
Capillaries
A
- Tiny
- lowest pressure
- move towards the veins
14
Q
Venules and Veins
A
- Towards the heart
- Less muscular
- Low O2 and high CO2
- Lower pressure then arterioles and arteries
15
Q
Systole
A
The period during which the heart contracts
