tissue fluid

Question 1

What is the composition of blood?

Answer 1

Red blood cells carry oxygen
White blood cells fight pathogens
Platelets for clotting
Plasma contain salt, minerals, glucose, fatty acids, amino acids, hormones plasma protein

Question 2

What is tissue fluid?

Answer 2

Plasma leaking out from capillaries that in direct contact with cells and provides nutrients and oxygen

Question 3

How does the composition of tissue fluid differ from blood?

Answer 3

no erythrocytes platelets or plasma protein

Higher concentration of CO2 from respiring cells, lower O2, concentration and amino acids and glucose

Question 4

how does tissue fluid form and
what two forces does the amount of fluid that leaves capillaries depend on?

Answer 4

walls of the capillaries consist of endothelium cells which have gaps this allows water and molecules of low. Molecular mass to pass through proteins remain in capillaries as they are too big.

Hydrostatic pressure = BP
Oncotic effect = osmotic effect

Question 5

What happens at the arterial end of papillary during tissue fluid formation?

Answer 5

hydrostatic pressure is higher than a oncotic pressure. This forces fluid out of capillaries.

Oncotic pressure of blood is low due to the plasma proteins

Question 6

what happens at the venous end of the capillaries during tissue fluid formation?

Answer 6

hydrostatic pressure is lower than the oncotic pressure so tissue fluid returns to the capillaries and contains water, CO2 and waste

Oncotic pressure stays low as plasma proteins cannot leave the capillaries

Question 7

what happens to tissue fluid that does not return to the venule end

Answer 7

It is drained into the lymphatic system and forms length later, returned to blood via the lymphatic duct

Question 8

compare blood tissue fluid and lymph