The thymus consists mainly of lymphoid tissue.

Antibodies mark antigens for destruction.

Only lymph nodes filter lymph.

T lymphocytes originate from the red bone marrow.

concentration of oxygen and/or total atmospheric pressure is higher at higher altitudes

basal metabolic rate is higher at high altitudes

concentration of oxygen and/or total atmospheric pressure is lower at high altitudes

temperature is lower at higher altitudes

B cell

Regulatory T cell

Memory cell

Cytotoxic T cell

T helper cell

plasma cells

T cells

natural killer cells

B cells

antibodies

Single layer of smooth muscle cells

Basement membrane

Capillary endothelium

Alveolar epithelium

Alveolus

Trachea

Nasopharynx

Oropharynx

increased pressure in the lymphatics in the limb proximal to the blockage

abnormally high lymph drainage from the distal region

shrinkage of tissues in the limb distal to the blockage due to inadequate delivery of lymph

severe localized edema distal to the blockage of that limb

Basal lamina allows gas exchange between the alveolar epithelium and capillaries.

Type II alveolar cells secrete surfactant to avoid alveolar collapse

All of the above except c

Alveolar macrophages help in the monitoring of the epithelial area to remove particles or pathogens.

Elastic fibers assist in the expiration process.

All of the above.

storage of blood platelets

removal of old or defective blood cells from the blood

forming crypts that trap bacteria

storage of iron

A and b 

Intact skin and mucous membranes

Acids, enzymes, and defensins

Inflammatory response, the skin and mucous membranes

A and c