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BODY SYSTEMS
COACH K
HEALTH
SYSTEMS OF THE BODY
Skeletal
 Muscular
 Integumentary
 Circulatory
 Respiratory
 Digestive
 Sensory
 Reproductive
 Excretory
 Lymphatic(Immune)

SKELETAL
The skeleton is a strong yet flexible framework of
bones and connective tissue.
 Provides support and structure
 Assists with Muscular systems in movement
 Provides protection of vital organs

SKELETON SYSTEM
AXIAL SKELETON
APPENDICULAR
SKELETON
MUSCULAR SYSTEM
The muscular system consists of layers of
muscles that cover the bones of the skeleton
 Extends across joints
 Can contract and relax to produce movement
 Responsible for movement
 Voluntary vs Involuntary

NERVOUS SYSTEM
The nervous system is the body’s main control
system.
 It consists of the brain, the spinal cord, and a
network of nerves that extend out to the rest of
the body.
 Controls most body functions
 Negative Feedback Loop
 Reflexes

RESPIRATORY SYSTEM
DIGESTIVE SYSTEM
Starts in the mouth
 Stomach acid helps
break down food
 Moves through system
 Most absorption takes
place in small
intestine

INTEGUMENTARY SYSTEM

The skin, hair, and
nails form the body’s
outer covering, or
integument. They help
to protect the body’s
internal parts from
damage and provide a
barrier to invasion by
infectious organisms.
An adult’s skin covers
an area of about 2
m2 or 22 sq ft
CIRCULATORY SYSTEM

The circulatory system, also called
the cardiovascular system or the vascular
system, is an organ system that permits blood to
circulate and transport nutrients (such as amino
acids and electrolytes), oxygen, carbon
dioxide, hormones, and blood cells to and from
the cells in the body to provide nourishment and
help in fighting disease, stabilizing temperature
and pH, and maintain homeostasis.
BLOOD MOVEMENT, CIRCULATION
IMMUNE SYSTEM

This system is a
network of vessels
that collects fluid from
tissues and returns it
to the blood. It also
contains groups of
cells that protect the
body against infection.
CELLS

The basic building blocks of the body are tiny
structures called cells. The human body contains
trillions of cells, which fall into several types –
nerve cells, muscle cells, fat cells, liver cells, and
so on – each with a different function. A typical
cell has a central nucleus surrounded by some
jellylike material called cytoplasm. Covering the
cytoplasm is the plasma membrane. This controls
the movement of substances into and out of the
cell.
CELLS CONTINUED

Cells come in different shapes and sizes, but all
have features in common. Most cells have a
nucleus. This contains genetic material, which
directs the cell’s activities. The cytoplasm
contains small structures called organelles. There
are several types of organelle, each with a
specific job. Mitochondria, for example, produce
energy for the cell.
NERVE CELLS

Nerve cells, or neurons, are one of the most
numerous types of body cell. Each nerve cell has
a central body, containing the cell nucleus, and
fibrelike projections, which can be up to 1 m (3
1/3 ft) long. The nervous system contains billions
of neurons, which collect and transmit
information around the body. The adult brain
alone may contain as many as 25 billion neurons.
TISSUES

Cells group together to form tissues, each with
specific functions. Connective tissue is the most
widespread; it separates and supports other
tissues and organs, and includes cartilage and
bone. Adipose tissue is packed with fat cells,
which provide energy storage and insulation.
Epithelial tissue protects and lines the surfaces
of many body organs. Other types include muscle
and nervous tissue.
ORGANS

Tissues are grouped together in the body to form
organs. These include the brain, heart, lungs,
kidneys, and liver. Each body organ has a specific
shape and is made up of different types of tissue
that work together. For example, the heart
consists mainly of a specialized type of muscle
tissue, which contracts rhythmically to provide
the heart’s pumping action. But it also contains
nervous tissue, which carries the electrical
signals that bring about the contractions, and is
lined with epithelial tissue.