文档介绍：心的外形和腔内结构
Contents
Introduction
Location, relationship & shape of the heart
Internal structures of heart chambers
Septum of the heart
Introduction to Vascular System
Part 1
The vascular system is a work
of vessels in the body. It is subdivided
into the cardiovascular and the
lymphatic systems.
The cardiovascular system consists of
the blood, the heart, and the blood
vessels which include the arteries,
capillaries and veins. It transports
numerous substances to and from cells
for their survival and is sometimes
called the circulatory system.
The lymphatic system posed of
lymphatics, lymphoid tissue and
ans. It transports a fluid
(called lymph) that has escaped from
blood vessels back to bloodstream at
the junction of the jugular and
subclavian veins at both sides of the
neck. The lymphatic system is an
immune and defensive system of the
body.
Cardiovascular System
Heart
Arteries
Capillaries
Veins
Blood
Circulation
The flow of blood through
work of the blood
vessels in the body over and
over again is called blood
circulation.
The blood circulation can be
divided into two parts:
systemic circulation and
pulmonary circulation.
The systemic (greater) circulation is
circulation of blood through which
blood flows from left ventricle into
the aorta and its branches to all
parts of the body, and returns to
the right atrium via the superior
and inferior vena cava.
The systemic circuit carries
oxygenated blood throughout the
body and picks up carbon dioxide
from body tissues. In this process,
blood changes from arterial
blood to venous blood; its color
changes from scarlet to dark red.
Blood vessels in the systemic circuit
also (1) pick up nutrients from the
digestive tract and deliver them to
cells throughout the body, and (2) receive nitrogenous wastes from body cells
and transport them to the kidneys for elimination in the urine.
The pulmonary (lesser) circulation
is bloo