Anatomy of cardiovascular system Dr. Waleed Al-Katib
1.Heart 2.Blood vessels Heart • Cone shape, fest size, 12 cm long, 9 cm wide • Weight: male = 250-390 gm, female: 200-275 gm • Site: in mediastinum area , between the 2 nd rib and 5 th inter- costal space, at mid clavicular line (8 cm from mid-sternum • It turned left on its longitudinal axis • Has a narrow mobile lower part (apex) and wide fixed upper part (base) • Heart is responsible for producing “ atrial natriuretic factor”, a hormone, in responses to increased plasma volume
Heart skeleton • it is a fibrous tough connective tissue • provides attachment site for the valves and muscles • made up of fibrous trigone and four rings surrounded the heart opening which are regulated by valves which control the blood flow Heart chambers • heart is a hollow organ which has 4 chambers • upper chambers, auricles (right and left atria) • lower champers, ventricle (right and left ventricles) • heart is divided vertically down the middle by septum, into right and left heart
• at the top of each half, the atria • atria have a flap like appendage of unknown function, called Auricle • between the right and left atrium is a thin partition called the inter-atrial septum • There ( inter-atrial septum), is an oval depression called Fossa Ovalis Heart valves 1. Atrio-ventricular valves • Located between the atria and ventricles • They are supported by tendinous cord “Chordae Tendineae) • Chordae Tendineae arise form nipple like muscle called Papillary Muscle , located in the ventricles
Two types , 1. Atrio-ventricular valves a.Triccuspid valves: • has 3 flaps • guards the opening between right atrium and right ventricle b. Bicuspid valves (mitral valve): • has 2 flaps • guards the opening between the left atrium and left ventricle. 2. Semilunar valves: located between the ventricles and the big vessels a. Aortic valve : that pass blood from left ventricle to Aorta b. Pulmonary valve: which passes the blood from right ventricle to pulmonary trunk
Heart wall . .
You've reached the end of your free preview.
Want to read all 98 pages?
- Fall '16
- right atrium