Lab 9: Hematology & Intro to Heart and Circulation

Plasma

55% of blood; the majority of whole blood

Plasma proteins

proteins within plasma

Albumins

60% of plasma

important for regulating osmotic pressure

Globulins

35% of plasma

immunity & transportation of lipids and hormones

Fibrinogen

4% of plasma

blood clotting precursor in injury

Formed elements

45% of blood

RBC, WBC and cell fragments (platelets)

Erythrocytes

RBC- concave discs that transport O2 in blood

Leukocytes

WBC- immunity defenses

Platelets (cell fragments)

help with blood clotting

Hemoglobin

Red pigment in blood (purple molecule)

Transports O2 and CO2

Heme

(orange discs)

Where O2 binds

Rouleaux

single file of stacked RBCs

Neutrophils

circulating WBCs

Multilobe nuclei (2-5) nuclei

Most abundant

Eosinophils

Red color

Bi-Lobe

fight parasites

Basophils

Dark granules- cannot see the nucleus

least abundant

allergic reactions

Monocytes

Have an irregular shape and a large nucleus

lymphocytes

T cells, B cells, Natural killer cells

Have a halo effect/ring around the nucleus

Mediastinum

Chamber between 2 pleural cavities where heart, great vessels, trachea, thymus and esophagus are located

Artery

more muscular

Rebound back to circular shape

carry blood AWAY from the heart

Vein

Thinner and not perfect circles

Carry blood TO the heart

Capillaries

connections between veins

gas and nutrient exchange occur here

Pulmonary circuit

the arteries and veins in the lungs

Pump blood from the right side of the heart to the lungs

Systemic circuit

carries blood to the rest of the body

Tunica intima

(vessel wall structure)

Innermost layer

tunica media

middle layer of vessel wall

Tunica externa

outermost layer of vessel wall

Pericardial cavity

the space where the heart sits

Apex of the heart

point of heart

base of the heart

the widest, top, flat part of the heart

Atria

the top two chambers of the heart

Ventricles

Bottom 2 chambers of the heart