ANAT 100 Lecture Notes - Lecture 8: Tunica Intima, Tunica Media, Bone Marrow

• School: Queen's University
• Department: Anatomy and Cell Biology
• Course: ANAT 100
• Professor: Leslie W Mac Kenzie

Document Summary

Blood performs a wide variety of functions, including: Blood has predictable and stable characteristics that allow it to complete its functions. Formed elements: three types of formed elements make up 45% of the blood, erythrocytes: also known as red blood cells (rbcs) and contain hemoglobin to transport o(cid:454)(cid:455)ge(cid:374) a(cid:374)d (cid:272)ar(cid:271)o(cid:374) dio(cid:454)ide through the (cid:271)od(cid:455). Features of platelets include: they la(cid:272)k (cid:374)u(cid:272)lei, (cid:373)aki(cid:374)g the(cid:373) (cid:862)(cid:374)o(cid:374)-true (cid:272)ells(cid:863), the(cid:455) are rou(cid:374)d or spi(cid:374)dle shaped dis(cid:272)s, they are. 2-4um in diameter, and they originate from megakaryocytes in the red bone marrow. Leukocytes: also known as white blood cells (wbcs). These cells have a nucleus but do not contain hemoglobin. Leukocytes are further divided into two divisions: granulocytes and agranulocytes. In total, there are five different cell types: granulocytes are a division of leukocytes. The common features of granulocytes are granules in the cytoplasm of the cell and a segmented (lobed) nucleus.