What role does oxygen and carbon dioxide play in the circulatory system?

1 answer:

7 0

Oxygen and carbon dioxide is exchanged by the millions of alveoli in the lungs and the capillaries that envelop them. we inhale oxygen (which is then exchanged with carbon dioxide in the lungs) and then we exhale the carbon dioxide. although, the air that we breathe usually consists more nitrogen than oxygen.

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With which portion of an epithelial cell in the stomach would food be in contact?

Jobisdone [24]

Answer:

b) Apical surface

Explanation:

Apical surface is the portion of an epithelial cell in the stomach that food wouold be in contact with.

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2 years ago

The ______ system is assisted by the lymphatic system and the physical barriers of the skin and gastrointestinal tract.

mezya [45]

Answer:

The correct answer is- Immune system

Explanation:

There are physical, chemical and immunological barriers present in our body which helps us to protect from the foreign antigen. They all assist each other and helps in pathogen removal from our body.

The physical barrier includes skin, gastrointestinal tract, respiratory tract, etc which do not allow the microbe to enter the body. Chemical barriers include tear, saliva, acid in the stomach which kills microbes on the body surface.

Immune cells like macrophages, B cells kills microbes when it gets in the body. Lymphatic system also contain immune cells and helps in microbe removal.

So the immune system is assisted by physical barrier, chemical barrier, and lymphatic system.

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2 years ago

Benedicts reagent is an indicator for the presence of ______________ in solution.

notka56 [123]

Benedict's reagent is solution of copper sulfate,sodium carbonated,and sodium citrate

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2 years ago

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Are there other types of cells other than prokaryotic and eukaryotic cells?

stepladder [879]

Answer: No there is not im pretty sure there are only those two cell types.