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Biology Trimester 3

1. There are three main types of muscle tissue in the human body: skeletal, cardiac, and smooth muscle. 2. Skeletal muscle is voluntary and controls movement of the skeleton. Cardiac muscle is only found in the heart and works involuntarily. Smooth muscle is involuntary and found in organs and blood vessels. 3. Skeletal muscle fibers are striated and have multiple nuclei. Cardiac muscle is striated with branched cells joined by intercalated discs. Smooth muscle is not striated with spindle-shaped cells containing one nucleus each.

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17 views3 pages

Biology Trimester 3

1. There are three main types of muscle tissue in the human body: skeletal, cardiac, and smooth muscle. 2. Skeletal muscle is voluntary and controls movement of the skeleton. Cardiac muscle is only found in the heart and works involuntarily. Smooth muscle is involuntary and found in organs and blood vessels. 3. Skeletal muscle fibers are striated and have multiple nuclei. Cardiac muscle is striated with branched cells joined by intercalated discs. Smooth muscle is not striated with spindle-shaped cells containing one nucleus each.

Uploaded by

delphinevyncke
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© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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1.

xMuscles

1.1 Human muscle tissue


1.1.1 types of human muscle tissue
3 types of muscle tissue: skeletal (or striated), cardiac (semi-striated) and smooth
(non-striated) muscle tissue.
Main functions
Skeletal muscle tissue: movement of the skeleton, voluntary muscle -> voluntary
(vrijwillig)
Smooth muscle tissue: found in the walls of the digestive system, bronchi, blood
vessels… -> involuntary
Cardiac muscle tissue exists only in our heart -> involuntary
Comparison of skeletal, cardiac and smooth muscles

a) SKELETAL MUSCLE
nuclei
Body location Cell shape and Action
appearance
- Mostly attached - Muscle fibers - Voluntary
to bones - Several - Powerful
- Other examples: peripheral - Tire easily
facial muscles nuclei
attached to skin - Striated view
and sphincters
(sluitspieren)
muscle fiber
striations

b) CARDIAC MUSCLE

Body location Cell shape and Action


appearance
Unique to the wall - Branched cells - Involuntary
of the heart - Cells join at - Powerful/rhythmic
connections - Tireless (in rest)
called
intercalated
discs
- Striated view
- 1 nucleus
c) SMOOTH MUSCLE

Body location Cell shape and Action


appearance
Mostly in the walls of - Spindle-shaped - Involuntary
hollow organs ands cells - Weaker
blood vessels - One nucleus per contraction
cell - tireless
- No striations

Parts of a microscope

Diaphragm
Light
source
1.1.2 skeletal muscle tissue
1.1.2.1 anatomy of skeletal muscle tissue nerve
connective tissue

Muscle
sarcolemma
Sarcolemma

Muscle fiber

myofilaments

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