Lab 18: Blood Histology and Heart

Function of Platelets (Thrombocytes)

Blood clotting

Function of Erythrocyte

Carries oxygen on the protein hemoglobin

Function of Neutrophils

Destroy bacteria by phagocytosis

Function of Eosinophils

Turn off allergic responses and kill parasites

Function of Basophils

Releases histamine for inflammation

Function of Lymphocytes

Launch immune response by direct cell attack

Function of Monocytes

Phagocytosis; become macrophages

What layer does the Cardiac muscle form

Myocardium

Function of Intercalated discs

Spread force and electrical signals equally throughout the heart wall

Function of Superior vena cava

Carries deoxygenated blood from the head, neck, chest, and upper limbs to the right atrium

Function of Inferior vena cava

Carries deoxygenated blood from the abdomen and lower limbs tot eh right atrium

What is the Fossa Ovalis

Remnant of the foremen ovale, a fetal structure that shunts blood from the right atrium to the left atrium

Function of Tricuspid valve

Prevents backflow of blood into right atrium when the right ventricle is in systole

Function of Pulmonary trunk and R&L pulmonary ateries

Carries deoxygenated blood to the lungs

Function of Pulmonary semilunar valve

Prevents backflow of blood into the right ventricle during ventricular diastole

Function of Pulmonary veins

Carries oxygenated blood from lungs to the left atrium

Function of Bicuspid valve

Prevents backflow of blood into left atrium when left ventricle is in systole

Function of Ascending Aorta

Carries oxygenated blood to all organs of the body

Function of Aortic semilunar valve

Prevents backflow of blood into left ventricle during ventricular diastole

List layers of the heart wall from most superficial to deep

Epicardium

Myocardium

Endocardium

Function of Interventricular septum

Separates left and right ventricles

What is in the Pericardial cavity

Serous Fluid