it is spherical
The skeleton give structure to the body as well as protects organs and parts of it make red blood cells, platelets and white blood cells.
white blood cells have nucleii (unlike red blood cells) and do not contain hemoglobin (again, unlike red blood cells). they are irregularly shaped, and there are fewer of them in the body.
the nucleus
The spleen is the primary organ involved in the breakdown of red blood cells. Here, old or damaged red blood cells are removed from circulation and broken down to recycle their components. Some parts of the red blood cells are reused to make new blood cells.
Red blood cells require glucose as their primary source of energy to carry out functions such as transporting oxygen from the lungs to the rest of the body and removing waste products like carbon dioxide. Glucose is metabolized in the red blood cells to produce ATP, which is essential for maintaining their structure and function.
HEART
Most cells you see will be red blood cells (erythrocytes) and they lack a nucleus in their structure.
In adults they are mostly produced in the bone marrow. There are situations where they can be produced elsewhere.
Red blood cells are considered cells, but they lack all organelles. Red blood cells cannot divide or replicate like other cells of the body.
They are found in the human body such as: skin cells red blood cells white blood cells sperm cells nerve cells etc. Thanks.
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.
The structure involved in the breakdown of red blood cells are called macrophages. Macrophages are white blood cells that are in connective tissues. They are formed to accumulate damaged or dead cells.