Frogs are amphibians. This means that they live on both land and water. When the frog is on land, it uses its lungs to breathe. During its time in water, and sometimes on land, oxygen is difused through its skin. The skin of the frog it extremely permeable. This means the oxygen will move through the skin from an area of higher concentration to an area of lower concentration.
from the aveolus
yep
Oxygen is absorbed into the blood primarily in the lungs. In the alveoli, oxygen diffuses from inhaled air into the surrounding blood vessels in exchange for carbon dioxide, which is then exhaled. This process is facilitated by the respiratory system during breathing.
Oxygen is in the air, and when you breathe in the oxygen gets into your lungs and is absorbed into the red blood cells.
Oxygen enters the body by being absorbed into the blood (specifically, it is absorbed by red blood cells which contain an oxygen-carrying compound known as hemoglobin) when air is inhaled into the lungs, which have a highly porous, spongy structure which facilitates the exposure of blood to the air.
Oxygen is absorbed in the blood stream primarily in the lungs through the process of diffusion. When we breathe in, oxygen from the air enters the lungs and diffuses across the alveoli into the capillaries, where it binds to hemoglobin in red blood cells and is transported throughout the body.
Oxygen is absorbed, and Carbon Dioxide is released.
The frog's skin has many small blood vessels so that oxygen can go through the thin skin, through the fine blood vessels, and into the blood stream, allowing for the frog to breathe more easily.
In lungs where carbon dioxide is released and oxygen absorbed and in cells where oxygen is given to cells and carbon dioxide is absorbed by blood.
I'm pretty sure that the frogs pulmonary artery carries oxygen poor blood to the lungs.
A frog is an amphibian, but adult frogs do not have gills. They absorb oxygen from the water through their skins, using special blood vessels. If the oxygen level in water is too low, frogs will move around to increase the water flow across the skin. Some frogs have creased skins that can increase their surface area. (see related question)
The blood that leaves the frogs heart through the ventricles is almost pure blood. This blood goes to the brain.