Cells to Organ Systems - Human Biology - Lecture Slides, Slides for Human Biology. KIIT University
anandi
anandi24 January 2013

Cells to Organ Systems - Human Biology - Lecture Slides, Slides for Human Biology. KIIT University

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These are the lecture slides of Human Biology. Key important points are: Cells to Organ Systems, Protection, Absorption, Filtration, Excretion, Secretion, Sensory Reception, Membranous Epithelia, Glandular Epithelia, Exo...
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No Slide Title

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Epithelia comes in 2 forms: 1. Glandular epithelia 2. Membranous epithelia Functions:

• Protection • Absorption • Filtration • Excretion • Secretion • Sensory reception

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Exocrine Gland ducted glands

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Exocrine Gland ducted glands

Merocrine gland Holocrine gland Docsity.com

Goblet cells

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Secretes product directly directly in blood

Secretes product through duct

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• Simple Squamous Epithelium • Simple Cuboidal Epithelium • Simple Columnar Epithelium • Stratified Epithelium • Pseudostratified Columnar Epithelium • Transitional Epithelium

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Simple Squamous Epithelium

Function: gas exchange in lungs Location: lines blood vessels, lymph vessels and various membranes within the thorax and abdomen

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Simple Squamous Cells

Frog skin Docsity.com

Simple Cuboidal Epithelium

Function: secretion and absorption

Location: kidney tubules Docsity.com

Simple Cuboidal Epithelium

Mammalian kidney Docsity.com

Simple Columnar Epithelium

Function: protection, secretion and absorption (associated w/goblet cells-exocrine) Location: lines uterus and digestive tract

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Simple Columnar Epithelium

1. Smooth muscle (long. layer) 2. Smooth muscle (circ. layer) 3. Simple columnar epithelium 4. Goblet cell 5. Lumen of the intestine

Cross section of small intestine

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Stratified Squamous Epithelium

Function: protects underlying cells from harmful env. effects

Location: covers skin, lines mouth and throat, vagina, and anal canal Docsity.com

Stratified Squamous Epithelium

1. Stratified squamous epithelium 2. Lumen of the esophagus 3. Connective tissue

Cross section of esophagus Docsity.com

Epidermis of the Skin

cornified layer of dead cells

stratified squamous epithelium

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Pseudostratified Columnar Epithelium

goblet cell

Function: secretion and propulsion of mucus

Location: lines respiratory and reproductive system Docsity.com

Stratified columnar

Function: protection and secretion

Location: rare in body, small amount in male urethra and in large ducts of some glands

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Transitional

Function: stretches

Location: lines ureters, bladder and part of urethra

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Tight Junction • fluid tight seal • prevents fluid from leaving a cavity

Anchoring Junction (adherens, desmosome &

hemidesmosome) • tissues that stretch, ex. Heart muscle

Gap Junction

• passage of chemical & electrical signals

Contact points between the plasma membrane of tissue cells.

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Gap Junction

Hemidesmosome Desmosome Adherens

Tight Junction

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Connective Tissues

• Loose Connective Tissue • Dense Connective Tissue • Adipose Tissue • Cartilage • Bone • Blood

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Connective Tissues Functions: 1. Connects body parts 2. Protection 3. Insulation 4. Transport substances

Common characteristics: 1. All originate from mesenchyme 2. Well vascularized 3. Extracellular matrix Three main elements: 1. Ground substance 2. Fibers 3. Cells

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