Lab 6

Question 1

How many chambers does a fish heart have

Answer 1

2

Question 2

How many circuits does a fish heart have

Answer 2

1 circuit, further from heart, pressure drops, fish must swim

Question 3

How many chambers does a frog (amphibian) heart have

Answer 3

3 chambers : right and left atrium + ventricle

Question 4

How many circuits does a frog (amphibian) heart have

Answer 4

2 : pulmocutaneous + systemic

Question 5

Does blood mixing occur in a frog (amphibian) heart

Answer 5

Yes

Question 6

How many chambers does a turtle (non cro reptile) have

Answer 6

3 chambers , incomplete septum

Question 7

Does blood mixing occur for turtle (non-croc reptile)

Answer 7

Yes

Question 8

What is a special trait that non croc reptile (turtle) have

Answer 8

Right systemic or Bypass aorta: deoxygenated blood can bypass pulmonary circuit to be recirculated out of the systemic circuit during periods of apnea : shunting

Question 9

How many chambers does a croc have

Answer 9

4

Question 10

Does a crocodile have a septum

Answer 10

Yes , complete

Question 11

Does blood mixing occur in crocodiles

Answer 11

Yes, from main aorta, via a hole between the aorta called the foramen of Panizza

Question 12

In croc, what is the hole between the aorta called

Answer 12

Foramen of Panizza

Question 13

How many chambers does a bird heart have

Answer 13

4 chambers

Question 14

Is there blood mixing in bird hearts

Answer 14

No blood mixing

Question 15

Which side of bird heart had oxy vs deox blood

Answer 15

Right = only deox
Left= only ox

Question 16

What is bird heart closest to

Answer 16

Closer to reptiles then mammals

Question 17

How many chambers does a dog (mammal) heart have

Answer 17

4

Question 18

Is there blood mixing in dog (mammal) hearts

Answer 18

No

Question 19

What is diff between dog and bird heart

Answer 19

Aortic arch

Question 20

How many chambers does a human heart have

Answer 20

4

Question 21

What distinguishes human and dos (mammal) heart

Answer 21

Human = aorta has 3 branches
Mammal (dog) = aorta has 2 branches

Question 22

What ancestors did birds arise from

Answer 22

Reptilian

Question 23

Are the similarities between systems of mammals and birds convergente or divergent evolution

Answer 23

Divergent : no common ancestors

Question 24

Where are the systemic capillaries always located

Answer 24

On the bottom

Question 25

Which animals have a septum (partial or complete)

Answer 25

Turtle (non croc reptile) : incomplete
Crocodile : complete
Bird : complete
Dog (mammal) : complete
Human : complete

Question 26

Is the systemic circuit ox or deox

Answer 26

Systemic = oxygenated (heart circuit)

Question 27

What is the order of the human (mammal) blood flow through the heart

Answer 27

1- Vena cava
2- right atrium (deox blood)
3 - tricuspid valve
4- right ventricle (deox blood)
5- pulmonary semi-lunar valve
6- pulmonary trunk
7- pulmonary arteries (left and right)
8- lung capillaries
9 - pulmonary veins
10- left Atrium
11- bicuspid valve (strings)
12- left ventricle
13- aortic semi-lunar valve
14 - aorta

Question 28

Which valve separates the right atrium and ventricular

Answer 28

Tricuspid valve

Question 29

Which valve separates the right ventricle and pulmonary trunk

Answer 29

Pulmonary semi-lunar valve

Question 30

Which valve separates the left atrium and ventricul

Answer 30

Bicuspid valve

Question 31

Which valve separates the left ventricle and the aorta

Answer 31

Aortic semi-lunar valve

Question 32

why do birds and mammals have similar hearts

Answer 32

• must both be efficient at oxygenating blood for high metabolic demands: they are endotherms:regulate body temp with internal mechanicms and use their muslcles