Download Organs - Images

Tissue Notes
CELL THEORY
• With the invention of the microscope and the
contributions of many scientists, a very
important question was answered in the 1850’s.
The question was:
• Where do cells come from?
There are three concepts to the cell
theory…
• Every living thing is made up of one or
more cells.
• Cells carry out the functions needed to
support life
• Cells come only from other living cells
Organization
•
•
•
•
CELLS make up TISSUES
TISSUES make up ORGANS
ORGANS make up ORGAN SYSTEMS
ORGAN SYSTEMS make up ORGANISMS
Tissues of the
Body
From Cells to Organ Systems
• Cells combine to form tissues, and
tissues combine to form organs.
• Cells combine to form four primary
tissues.
– Epithelial tissue
– Connective tissue
– Muscle tissue
– Nervous tissue
Epithelium
• Used for interior or exterior linings of
organs
– membranous epithelia
• form the coverings or linings of organs
– glandular epithelia
• form exocrine and endocrine glands
Epithelium-Human Stomach
Connective Tissue
• Binds the cells and organs of
the body together and consist
of two basic components: cells
and extracellular fibers.
• Connective tissue is used for
support, storage or transport
• The body contains three types
of specialized connective
tissue:
• Cartilage
• Bone
• Blood
Section 4-1
Connective Tissue
•Cartilage
–Consists of specialized cells
used for support and protection.
•Blood
–Contains blood cells, platelets,
plasma and is used used for
transport of nutrients and
wastes to and from body organs
as well as protection from
infecting pathogens
Osseous Tissue
• Bone
– Consists of bone cells
(osteocytes) and a
calcified cartilage
matrix
• Two types of bone
tissue exist: spongy
and compact
Muscle Tissue
• Consists of specialized cells that contract when
stimulated
• The body has three types of muscle tissue:
• Skeletal (voluntary)
• Cardiac (involuntary)
• Smooth muscle (involuntary)
Muscle Tissue
Nervous Tissue
• Transmits messages by
carrying electrical impulses
over neurons or nerve cells
• Conducting cells, called
neurons, transmit impulses
from one region of the body
to another.
• Nonconducting cells,
neuroglia, are a type of
nervous system connective
tissue.
Nerve Tissue
Organ Systems
• Tissues combine to form organs.
– Organs are discrete structures that have evolved to
perform specific functions
– Most organs do not function alone, they are part of a
group of cooperative organs, called an organ
system.
Let’s go to the Video
http://www.teachertube.com/viewVideo.php
?video_id=156049