Biology Questions and Answers
Blood
- What are the main
functions of the blood?
The blood is a means of substance
transportation throblood distributes nutrients, oxygen,ughout the body. The
hormones, antibodies and cells
specialized icollects residuals like nitrogen wastesn defense to the tissues and
and carbon dioxide from them.
- What are the constituent
elements of the blood?
The blood is made of a liquid and a
cellular plasma and in it thpart. The fluid part is calledere are several
substances, like proteins, lipids,
carbohydrates and mineral salts. Thecellular constituents of the blood are
also known as blood corpuscles and
they compblood cells),rise the leukocyteserythrocytes (red and platelets.
- What is hematopoiesis?
Hematopoiesis is the formation of blood
cells anthe blood.d other constituent elements of
- Where does hematopoiesis
occur?
Hematopoiesis occurs in the bonemarrow (mainly within where erythrocytes, leukocytes andflat bones), (^)
platelets are made, and in the lymphoid
tissue, rleukocytes anesponsible fd found in the thymus,or the maturation of
spleen and lymphnodes.
- In which bones can bone
marrow chiefly be found? Is
the bone marrow made of
osseous tissue?
Bone marrinternal cavitiesow can mainly of flat bones, like be found in thethe
vertebrasternum and the hips.e, the ribs, the scapulae, the
The bone marrow is nosseous tissue, although it is aot made of
connective tissue as bone tissue is. - What are blood stem cells?
Stem cells are undifferentiated cellsto differentiate into other types of able
specialized cells.
The stem cellsoriginate the differentiated b of the bone marrowlood cells. (^)
Accordingrowth fg to stimulusactors the stem c from specificells are turned (^)
into red blood cells, leukocytes and
megakaryocytes (cells that foplatelets). Research shows that stemrm (^)
cells of the bone marrow can also
differentiate into muscle, nervous anhepatic cells. d
http://www.biology-questions-and-answers.com