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Histology Concept Map
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Histology Concept Map
By: Adeline Jacobs
Histology is the study of tissues.
Four Major Types of Tissue
1. Epithelial
2. Connective
3. Muscle
4. Nervous
Epithelial Tissue
- Covers body surfaces
- Lines body passageways & body cavities
- Forms Glands
Functions
Epithelial Tissue
- Protection
- Secretion
- Absorption
- Transport
Simple Squamous
Function: Aborsption, Diffusion
Located: Alveoli (Air sacs of lungs), Kidneys, and surrounding blood vessels
Simple Cuboidal
Function: Secretion, Absorption
Location: Glands, Ducts, Kidney tubules
Simple Cuboidal
Stratified Squamous
Function: Resist stress and friction
Location: Keratinized cells are found on the skin, Nonkeratinized are found lining surfaces of the mouth, toungue, throat, esophagus and vagina
Stratified Squamous
Simple Columnar
Function: Absorption, Secretes mucus and enzymes
Location: Lines stomach, Small and large intestine
Simple Columnar
Pseudostratified Ciliated Columnar
Function: Secretes and moves mucus
Location: Lines uterus, nasal cavity, trachea, and large airways of the lungs.
PseudostratifiedCiliated Columnar
Transitional
Function: Elasticity
Location: Urinary bladder, ureters and urine collecting chambers of the kidneys
Transitional
Connective Tissue Proper
Connective Tissue
- Found throughout the body
Function
Connective Tissue
Specialized Connective Tissue
- Connects various tissue types together
- Binds organs
- Protection
- Carries nutrients and wastes
- Movement
- Insulation
Loose Connective
Function: Binding, Diffusion of nutrients
Location: Underlies epithelium, surrounds blood vessels and nerves
Loose Connective
Dense Regular
Function: Strength, resist stress
Location: Tendons, ligaments
Dense Regular
Dense Irregular
Function: Strength, Resist stress
Location: Joints, Dermis of skin
Dense Irregular
Reticular
Function: Filtration, forms internal structures of organs
Location: Spleen lymph nodes, Bone marrow, Liver
Reticular
Adipose
Function: Insulation, Padding, Energy reserve
Location: Deep to the skin, surrounds heart and abdominal organs
Adipose
Fibrocartilage
Function: Rigid support
Location: Vertebra, Pubic symphysis, Knee
Fibrocartilage
Elastic Cartilage
Function: Flexible Support
Location: Ears, Epiglottis
Elastic Cartilage
Hyaline Cartilage
Function: Intermediate support
Location: End of long bones, Nose, Ribs, Respiratory tract
Hyaline Cartilage
Bone
Function: Support, Protection, Storage, Production of blood cells
Location: Bones
Bone
Blood
Function: Transport gases, Nutrients and waste
Location: Contained in blood vessels and heart
Blood
Muscle Tissue
The function of this general type of tissue is movement.
Muscle Tissue
Skeletal Muscle
Skeletal Muscle
Description: Striated, Multinucleated
Type of Movement: Voluntary
Location: Attached to bone
Cardiac Muscle
Cardiac Muscle
Description: Striated, 1-2 centrally located nucleus
Type of Movement: Involuntary
Location: Heart
Smooth Muscle
Description: Smooth appearance, Single nucleus
Type of Movement: Involuntary
Location: Organs, Glands, Ducts, Blood vessels
Smooth Muscle
Nervous Tissue
- Found in the brain, spinal cord, and nerves.
- Nerve endings located throughout body.
Nervous Tissue
Neuron
Transmits electrical signals to, from and within the central nervous system (Brain and Spinal cord)
Neuron
- Very large cells with large cell body.
- Multiple short dendrites
- One axon
- Large nucleus; easy to distinguish
Neuroglial Cells
Support, nourish, anchor and insulate nuerons. Do not transmit electrical signals.