blood chapter16

What are the two main components of the circulatory system ?

Cardiovascular system (heart, blood,vessels), lymphatic system ( carries lymph)

What is the volume of blood in adult males and females?

Mouse 5-6 liters

Females 4-5liters

What is the functions of erythrocytes

Transports oxygen and carbon dioxide

Where are blood cells formed

In red bone marrow

What is erythropoietin and its function

A hormone from kidneys, that stimulates red blood cell production

What happens to old red blood cells

Phagocytosed in liver/ spleen iron is recycled and stored as ferritin

What is hemochromatosis

A disorder where too much iron is absorbed leading organ damaged

what is hemophilia?

Impaired blood clotting treated with clotting factor infusions

What is polycythemia

Excess RBCs, making blood thick and slow flowing

What is leukemia

Cancer from uncontrolled WBC production in bone marrow

What is thalassemia

A disorder with insufficient hemoglobin chain production; RBCs rupture easily

What stem cells give rise to blood cells ?

Blood stem cells become myeloid and lymphoid stem cells

What are platelets and their role

Fragment of megakaryocytes help in blood clotting

What are the types of leukocytes?

Neutrophils, eosinophils, basophils, monocytes, B & T lymphocytes

What are leukocytes and their function

White blood cells; fight infections have nuclei, and can exit blood vessels

What are the components of blood

Cellular elements (RBCs, WBCs, plateletd) and plasma

What is hematrocrit and its normal range

Percentage of blood volume that is RBcs

What is the shape and lifespan of erythrocytes

Biconcave discs, no nuclei / organelles 100-120 days of lifespan.

What are the functions of blood

Transports nutrients, oxygen, waste, and hormones; carries WBCs, regulates temperature