+
Histology: Cardiac and Smooth Muscle

Histology: Cardiac and Smooth Muscle

Author: Aaron Mullally
Description:

- know where you find cardiac muscle in the body

- know what an intercalated disk and be and able to identify it

- know the morphological characteristics of a cardiac myocyte

- know where you find smooth muscle in the body

- know that smooth muscle cells have a fusiform shape

- know the morphological characteristics of smooth muscle

- compare and contrast between smooth, cardiac, and skeletal muscle

This packet will go over the histology of cardiac and smooth muscle. You will learn about the morphological differences between the two types of muscle tisse and a little about their functions.

(more)
See More
Introduction to Psychology

Analyze this:
Our Intro to Psych Course is only $329.

Sophia college courses cost up to 80% less than traditional courses*. Start a free trial now.

Tutorial

Overview of Cardiac and Smooth Muscle

Cardiac muscle
- in comparison to skeletal myocytes cardiac myocytes are short in length
- cardiac myocytes are not tightly packed, there are lots of gaps in between the cells
- cardiac myocytes have one nuclues per cell unlike skeletal myocytes which are multinucleated
- cardiac muscle tissue has interclated disks connecting the myocytes together
- cardiac muscle is involuntary, we do not consciously control it
- cardiac muscle is striated in appearance
- cardiac muscle is used by the heart to pump blood

Smooth muscle
- called smooth muscle because it lacks striations, just one solid color
- short cells (fusiform) that have just one nucleus
- this type of muscle is arranged in sheets
- smooth muscle is involuntary, we do not consciously control it
- smooth muscle is mainly found within hollow organs and is used to control the diameter of these organs
- it is found within blood vessels, the GI tract, iris of the eye, the uterus, our airways (bronchioles) and is used to control the openings of sphincters within the body
 

Source: The mind of Aaron

Histology of Cardiac and Skeletal Muscle

This is an overview about the histology of cardiac and smooth muscle with images

Source: Self made with images from Marieb and http://www.udel.edu/biology/Wags/histopage/colorpage/colorpage.htm

Cardiac and Smooth Muscle Images

Here are some images for you to study. When looking at the cardiac muscle I would recommend trying to find as many intercalated disks as you can. This will help you practice identifying them