Human transport

Question 1

Explain why the heart is a organ [1]

Answer 1

groups of tissues working together to pump blood around the body

Question 2

State names of 2 proteins found in blood [2]

Answer 2

haemoglobin
antibodies
fibrinogen

Question 3

Explain why pressure of blood in pulmonary vein and vena cava than in aorta and pulmonary artery [2]

Answer 3

blood flowed through capillaries
larger lumen

Question 4

Explain why blood in hepatic portal vein is deoxygenated rather than oxygenated [2]

Answer 4

been through capillaries
been through organ
lost oxygen to cells

Question 5

name 4 organs from which blood flows into hepatic portal vein

Answer 5

duodenum
ileum
large intestine
stomach
pancreas
gall bladder
oesophagus

Question 6

Describe role of hepatic portal vein in transport of absorbed nutrients [3]

Answer 6

glucose, amino acids
vitamins & minerals
in plasma
small intestine
to liver

Question 7

Explain how structure of heart enables it to pump blood into two circulations at different pressures [4]

Answer 7

septum
2 ventricles
ventricles contract
increase blood pressure
left ventricle thicker wall
so higher pressure
to whole body

Question 8

Function of capillaries [1]

Answer 8

exchange of substances to tissues