Download Cardiovascular System

Chapter 1
Introduction to
the Human
Body section 1
Cells
 The average human adult consists of 100 trillion
cells!!!!!!!
 Cells are the basic unit of structure and
function
 In all living cells
 Human cells have characteristics for carrying out
special functions
Groups of cells working
together form a TISSUE
There are 4 types of tissues:
EPITHELIAL TISSUE
Covers and protects underlying
tissue. When you look at the surface
of your skin, you see epithelial tissue
MUSCLE TISSUE
Made up of cells that can contract
and relax to produce movement
NERVOUS TISSUE
Sends electrical signals through
the body. It is found in the
brain, nerves and sense organs.
CONNECTIVE TISSUE
Joins, supports, protects, insulates,
nourishes, and cushions organs. It
also keeps organs from falling apart.
TISSUE + TISSUE= ORGAN
Two or more tissues working together,
form an organ
One type of
tissue alone
cannot do all
of the things
that several
types working
together can
do.
ORGAN + ORGAN = ORGAN SYSTEM
Organs working together
make up an organ system.
The failure of any
part can affect
the entire system
11 MAJOR ORGAN SYSTEMS
 Integumentary system
 Reproductive system.
 Muscular system
 Skeletal system
 Cardiovascular system
 Respiratory system
 Nervous system
 Lymphatic system
 Digestive system
 Urinary system
 Endocrine system
Integumentary System
Includes
skin, hair,
nails and
their
underlying
tissues
Muscular System
Skeletal muscles move bones.
Skeletal System
Bones frame
and protect
body parts.
Cardiovascular
System
The heart
pumps
blood
through
blood
vessels.
Respiratory System
Lungs absorb oxygen and
release carbon dioxide.
Excretory System
Removes wastes from the blood and
regulates body fluids.
Reproductive System
Females produces eggs, feed/shelter unborn
baby- males produce sperm.
Nervous System
Receives and sends electrical
messages.
Lymphatic
System
Returns leaked
fluids to blood
vessels and
helps flush
harmful germs
out.
Digestive System
Breaks
down
food into
nutrients
.
Endocrine System
Glands regulate body functions by
sending out chemical messages.
HOMEOSTASIS
 The human body’s maintenance of a stable internal
environment.
 Body Systems working together
 If homeostasis is interrupted, cells suffer and
sometimes die