CELLS AND TISSUES KOSTIS GYFTOPOULOS MD, PhD ASS. PROFESSOR OF ANATOMY.

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Presentation transcript:

CELLS AND TISSUES KOSTIS GYFTOPOULOS MD, PhD ASS. PROFESSOR OF ANATOMY

TISSUE TYPES EPITHELIALEPITHELIAL CONNECTIVECONNECTIVE BLOOD MUSCLEMUSCLE NERVOUSNERVOUS

EPITHELIAL TISSUE Cells that are very tightly connected to each other, with very little free intracellular space. Covers the entire body, externally and internally. Skin + accessories Mucous membranes Glands (endocrine-exocrine)

DIFFERENT TYPES OF EPITHELIA Squamous Cuboidal Columnar Columnar ciliated Columnar with goblet cells Transitional Stratified

CONNECTIVE TISSUE Cells are immersed into an abundant “amorphous” intracellular substance, mainly water and proteins. Supports and connects other tissues. Cartilage Bone Adipose Blood and lymphatic tissue

Loose connective tissueCartilage

MUSCLE TISSUE Cells are “ELASTIC”, that is they can shorten or stretch, causing movement. Movement is accomplished through shortening in response to a stimulus Skeletal Smooth Cardiac

STRIATED MUSCLE

SMOOTH MUSCLE

CARDIAC MUSCLE

NERVOUS TISSUE Cells are “excitable” and specialized in transmitting stimuli or nerve impulses through special chemical-physical activity of their membrane. Great variation in shape, characteristics, length and function of nervous cells, according to their role NEURONS Supporting cells Neuroglial cells (CNS) Schwann cells (PNS)

THE NEURON

The skin…is an organ! (The integumentary system) Social function Protection from disease and injury Maintenance of homeostasis

Skin interaction with other systems Muscular (face expressions) Circulatory (vasodlation..) Nervous system (sensory receptors) Endocrine system (hormones..) Immune system

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