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DrPhil
0 Views ยท 10 months ago

How to approach histology for Human Anatomy students. Using a key will help get you through it! Add some penguin fairy dust will help too!

Please note: I mis-spoke and said "striated" instead of "stratified epithelium" a couple of times... apologies!

There are lots of histology keys out there, but the one I showed in the video is here: http://www.penguinprof.com/upl....oads/8/4/3/1/8431323

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Details:

Tissue in the human body:

Epithelial: Is made of cells arranged in a continuous sheet with one or more layers, has apical & basal surfaces.

A basement membrane is the attachment between the basal surface of the cell & the underlying connective tissue.

Two types of epithelial tissues: (1) Covering & lining epithelia and (2) Glandular Epithelium.

The number of cell layers & the shape of the cells in the top layer can classify epithelium.

Simple Epithelium - one cell layer
Stratified epithelium - two or more cell layers
Pseudostratified Columnar Epithelium - When cells of an epithelial tissue are all anchored to the basement Membrane but not all cells reach the apical surface.
Glandular Epithelium -- (1) Endocrine: Release hormones directly into the blood stream and (2) Exocrine - Secrete into ducts.


Connective: contains many different cell types including: fibroblasts, macrophages, mast cells, and adipocytes. Connective Tissue Matrix is made of two materials: ground substance - proteins and polysaccharides, fiber -- reticular, collagen and elastic.

Classification of Connective Tissue:
Loose Connective - fibers & many cell types in gelatinous matrix, found in skin, & surrounding blood vessels, nerves, and organs.
Dense Connective - Bundles of parallel collagen fibers& fibroblasts, found in tendons& ligaments.
Cartilage - Cartilage is made of collagen & elastin fibers embedded in a matrix glycoprotein & cells called chondrocytes, which was found in small spaces.
Cartilage has three subtypes:
Hyaline cartilage -- Weakest, most abundant type, Found at end of long bones, & structures like the ear and nose,
Elastic cartilage- maintains shape, branching elastic fibers distinguish it from hyaline and
Fibrous Cartilage - Strongest type, has dense collagen & little matrix, found in pelvis, skull & vertebral discs.


Muscle: is divided into 3 categories, skeletal, cardiac and smooth.
Skeletal Muscle -- voluntary, striated, striations perpendicular to the muscle fibers and it is mainly found attached to bones.
Cardiac Muscle -- involuntary, striated, branched and has intercalated discs
Smooth Muscle -- involuntary, nonstriated, spindle shaped and is found in blood vessels & the GI tract.


Nervous: Consists of only two cell types in the central nervous system (CNS) & peripheral nervous system (PNS):
Neurons - Cells that convert stimuli into electrical impulses to the brain, and Neuroglia -- supportive cells.
Neurons -- are made up of cell body, axon and dendrites. There are 3 types of neurons:
Motor Neuron -- carry impulses from CNS to muscles and glands,
Interneuron - interpret input from sensory neurons and end responses to motor neurons
Sensory Neuron -- receive information from environment and transmit to CNS.
Neuroglia -- is made up of astrocytes, oligodendrocytes, ependymal cells and microglia in the CNS, and schwann cells and satellite cells in the PNS.

DrPhil
0 Views ยท 10 months ago

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Scott
0 Views ยท 11 months ago

Scott
0 Views ยท 11 months ago

How to Know If You Have a Serious Knee Injury or Problem
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DrPhil
0 Views ยท 10 months ago

Epithelial tissue histology can be tricky โ€” itโ€™s everywhere around our body. In this video, Iโ€™ll teach you most of the different types of epithelium seen under a microscope including squamous, cuboidal, columnar, transitional, and keratinized epithelium.

โ˜ ๏ธNONE OF THE INFORMATION IN THIS VIDEO SHOULD BE USED AS MEDICAL ADVICE OR OPINION. IT IS FOR GENERAL EDUCATION AND ENTERTAINMENTโ˜ ๏ธ

๐Ÿ”— L I N K S ๐Ÿ”—
๐Ÿ“ฑInstagram: https://www.instagram.com/patkellyteaches/
๐ŸฆTwitter: https://twitter.com/PatKellyTeaches
๐Ÿ’ฐPatreon: https://www.patreon.com/corporis

๐Ÿ“ฝ O T H E R V I D E O S ๐Ÿ“ฝ
โšฐ๏ธMedical History playlist: https://www.youtube.com/playli....st?list=PL2rpvfNeooN
๐Ÿ”ฌAnatomy Basics playlist: https://www.youtube.com/playli....st?list=PL2rpvfNeooN
๐Ÿ’ชKinesiology and Biomechanics playlist: https://www.youtube.com/playli....st?list=PL2rpvfNeooN

๐Ÿ“œ S O U R C E S ๐Ÿ“œ
A full annotated, fact checked version of the script can be found here:
https://www.patreon.com/posts/45809032

๐Ÿ’ŠA B O U T ๐Ÿ’Š
Hi, Iโ€™m Patrick. Iโ€™m a freelance science writer based in the San Francisco Bay Area. I hold a bachelorโ€™s degree in Athletic Training and a masterโ€™s in clinical exercise physiology. I used to work in the clinical setting as a certified athletic trainer, physical therapy aide, and a certified strength and conditioning specialist. After working in the clinical setting, I went back to school and became a teacher. The goal of my content is to help normal people, not just pre-med students, learn about the human body. That might mean explaining a topic from an anatomy class or exploring a topic from medical history.

๐Ÿ’ป C O N T A C T ๐Ÿ’ป
If youโ€™d like to sponsor a video or have other business inquiries:
patkellyteaches [at] gmail.com

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