Q 01/05

The lymphatic system is considered part of which other body system?

A) Endocrine

B) Immune

C) Nervous

D) Skeletal

Answer · why

B) Immune

It works alongside the circulatory system, returning fluid to the blood while filtering out bacteria and damaged cells.

Q 02/05

Unlike the closed circulatory system, the lymphatic system is described as what kind of system?

A) Sealed

B) Pressurised

C) Open

D) Reversible

Answer · why

C) Open

Lymph starts as fluid that leaks out of blood capillaries into the tissues and is only later collected by blind-ended lymph vessels.

Q 03/05

Lymph originates from which fluid that leaks out of blood into the tissues?

A) Cerebrospinal

B) Synovial

C) Pleural

D) Interstitial

Answer · why

D) Interstitial

That fluid delivers nutrients to cells and collects waste, bacteria and damaged cells before draining into the lymph vessels.

Q 04/05

Roughly how many litres of blood does the circulatory system filter through capillaries daily?

A) 20

B) 35

C) 50

D) 80

Answer · why

A) 20

About 17 litres are reabsorbed straight back into the blood vessels, and the lymphatic system returns the remaining 3.

Q 05/05

About how many litres of fluid a day does the lymphatic system return to the blood?

A) 6

B) 12

C) 3

D) 9

Answer · why

C) 3

It is the leftover after most filtered plasma is reabsorbed directly, so the lymphatics act as an accessory return route.