I thought it was spoon shaped, but it turned out to be rectangular.
they are spherical in shape
It is biconcave in shape , mature red blood cell do not have nucleus,
Frogs have nucleated red blood cells, whereas humans have anucleated red blood cells. This means that frog red blood cells contain a nucleus, while human red blood cells do not. Additionally, frog red blood cells are elliptical in shape, while human red blood cells are biconcave disks.
sickle cell disease
Spectrin
The biconcave shape of a red blood cell provides a large surface area for oxygen and carbon dioxide exchange. The lack of a nucleus allows for more space to carry hemoglobin, which binds to oxygen for transport. This design enables efficient nutrient exchange and oxygen delivery throughout the body.
It is a donut shape.
Red blood cell count
sickle-cell disease
oxidyzed (blue blood) and de-oxidyzed (red blood) blood is mixed
The red blood cell's biconcave shape increases its surface area for diffusion. The lack of a nucleus makes this shape possible.
1) Frog's red blood cells contain a nucleus that carries all the genetic information needed to make new cells by replication. Human red blood cells contain no nuclei because they reproduce differently than frog. 2) We human have platelets in our blood but frogs do not have them.