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A hormone.
A rocket has it's own supply of oxygen.
They occur in the mitochondria, a type of organelle located in the cytoplasm.
Essentially the air inhaled, which includes oxygen, passes through the various bronchi and briochioles until it reaches the aveoli. Here is where oxygen diffuses due to a concentration gradient. The oxygen must diffuse 5 layers before it enters a red blood cell. The red blood cell can now deliver it to tissues. At the same time, carbon dioxide diffuses through 5 layers to reach the aveolar space and can be exhaled the 5 layers are as follows: (1) type 1 aveolar cell, (2) basal lamina of type 1 aveolar cell, (3) basal lamina of endothelial cell, (4) endothelial cell, and (5) plasma membrane of the red blood cell. Oxygen diffuses from 1 to 5 and Carbon dioxide difuses from 5 to 1. Oxygen and carbon dioxide are essentially trading places. Note: basal lamina is connective tissue that a cell adheres to. Bronchi and bronchioles are the tubes which air flows. aveoli are small sacs of empty space, which is the site for gas exchange. drazx is the original author of this answer
Insulin reduces the amount of sugar in your bloodstream to an acceptable level, and glucagon raises the amount of sugar in your bloodstream to an acceptable level. Glycogen is a stored type of the sugar, Glucose, that can readily be added to the bloodstream by glucagon.
Red blood cells.
hormone
A hormone.
A rocket has it's own supply of oxygen.
A rocket has it's own supply of oxygen.
Both T-Cells and B-Cells
The pulmonary artery carries blood away from the heart and it is low in oxygen.
The phloem
A motor neuron
Red corpuscles (red blood cells) carry oxygen in the bloodstream.
red
red blood cells..