Lymphatic System

Lymphatic vessels have one way flow due to the following characteristics:

• one-way entrance valves

• close-ended vessels

• low pressure system

• valves that prevent backflow

Which of the following are mechanisms that move lymph?

• pulsatile movement of nearby veins

• rhythmic contraction of smooth muscle in trunks and ducts

• respiratory pump

• muscle pump

These are in order from smallest to largest: capillaries, vessels, ducts, trunks

• true

• false

The thoracic duct is responsible for draining most of the body.

• true

• false

The thoracic duct drains into the junction of the right subclavian vein and internal jugular vein.

• false

• true

What are lacteals?

• lymphatic capillaries in the small intestine

• absorb chylomicrons

• absorb lipid droplets that are enveloped in protein

• tiny capillaries with extra valves

What trunks drain into the cisterna chyli?

• thoracic

• left lumbar

• right lumbar

• intestinal

What is responsible for the fluid entrance into the lymphatic capillaries?

• osmotic pressure of the lymphatic capillaires

• hydrostatic pressure of the blood capillaries

• net filtration pressure

• hydrostatic pressure of the lymphatic capillaries

Lymphocyte formation and maturation takes place in the secondary lymphoid structures.

• true

• false

Tags

NGSS.HS-LS1-4

Epithelial cells of the thymus secrete the _______ hormones that aid in __ lymphocyte maturation.

• growth, B

• proliferative, T

• thymic, T

• thymic, B