Transcript Cells & Tissues

Animal Cells (& Tissues)
Eileen Grzybowski
Cheek Cells
Cheek Cells
Cheek Cells
Cheek Cells are examples of
Epithelial Tissues
In which one(s) do cheek cells belong?
Nerve Cells = Neurons
Neurons
Bone Cells
Blood- Red Blood Cells
RBC’s = Erthrocytes
(red) (cell)
White Blood Cells – WBC’s
WBC’s = Leukocytes
(white)(cells)
(v. Platelets v. RBC’s)
Baby BC’s to Adult BC’s
In Summary…
Muscle Cells
Skeletal Muscle
Cardiac Muscle
Smooth Muscle
Skeletal Muscle
Tissues
• Biological tissue is a collection of interconnected cells that perform
a similar function within an organism.
• The study of tissue is known as histology, or, in connection with
disease, histopathology.
• The classical tools for studying the tissues are the , the , and the
optical microscope, though developments in electron microscopy,
immunofluorescence, and frozen sections have all added to the sum
of knowledge in the last couple of decades.With these tools, the
classical appearances of the tissues can be examined in health and
disease, enabling considerable refinement of clinical diagnosis and
prognosis. There are four basic types of tissue in the body of all
animals, including the human body and lower multicellular
organisms such as insects. These compose all the organs,
structures and other contents.
Animal Tissues are groups of
similar cells which work together.
Epithelium - Tissues composed of layers of cells that cover organ surfaces such as
surface of the skin and inner lining of digestive tract: the tissues that serve for
protection, secretion, and absorption.
Connective tissue - As the name suggests, connective tissue holds everything
together. Connective tissue is characterized by the separation of the cells by an
inorganic material, which is called extracellular matrix. Bone and blood are connective
tissues.
Muscle tissue - Muscle cells contain contractile filaments that move past each other
and change the size of the cell. Muscle tissue also is separated into three distinct
categories: visceral or smooth muscle, which is found in the inner linings of organs;
skeletal muscle, which is found attached to bone in order for mobility to take place; and
cardiac muscle which is found in the heart.
Nervous tissue - Cells forming the brain, spinal cord and peripheral nervous system.
Cells – the simplest structure
Tissues – epithelial, connective,
muscle, nervous
 Organs – stomach, heart, lungs,
brain, intestines, etc.
 Organ Systems – digestive,
respiratory, nervous, skeletalmuscular, etc.
 Organism – contains all of the
above