2. Dear Lord and Father of all, thank you
for your ways in which you provide for
us all. For your protection and love we
thank you. Help us to focus our hearts
and minds as we listen and write. Guide
us by your eternal light as we discover
more about the world around us. We
ask all this in the name of Jesus. AMEN.
Opening Prayer
4. Did you know that 40-
50% of total body weight
of a human body are
skeletal muscles?
Understand the characteristics of skeletal
muscle
Identify the structure of skeletal muscle
Explain the functions of the skeletal muscle
Today, you’ll be able to:
5. What if humans had no
bones?
What is the importance of
skeletal system in our body?
6. It serves as a framework for
the human body. It comprises
bones and connective tissues,
including cartilage, tendons and
ligaments.
The Skeletal System
7. • Most are attached to tendons and
bones.
• Cells are multinucleate
• Striated
• Cells are surrounded and bundled
by connective tissues
• Covers bony skeleton
Skeletal Muscle Characteristics
8. Found throughout the body and
functions to contract in response to a
stimulus.
Attached to bones via
tendons. Skeletal muscle is
also present in the tongue, diaphragm,
eye socket, and upper esophagus.
Skeletal Muscle
9. Serves many purposes,
including producing movement,
sustaining body posture and
position, maintaining body
temperature, storing nutrients,
and stabilizing joints.
Skeletal Muscle
11. • Skeletal muscle is under conscious
control, allowing voluntary movements of
the body.
• It contracts and relaxes to produce
various movements such as walking,
running, and lifting objects.
Voluntary Movement
12. • Skeletal muscles play a crucial role in
maintaining posture and stability by
supporting the body against gravity.
• They have stabilized joints and maintain
proper alignment of the skeleton.
Posture and Stability
13. • Skeletal muscle contractions produce heat
as a byproduct of energy metabolism.
• This heat production helps regulate body
temperature and contributes to
maintaining homeostasis.
Heat Generation
14. • Skeletal muscles surround and
protect vital internal organs such
as the rib cage, which protects the
heart and lungs.
Protection of Internal Organs
15. • Skeletal muscle is a major site of glucose
uptake and utilization, playing significant role in
regulating blood glucose levels.
• It also contributes to overall metabolic rate and
energy expenditure, particularly during
physical activity.
Metabolic Regulation
17. • Skeletal muscle is composed of long,
multinucleated cells called muscle
fibers.
• Each muscle fiber is formed by the
fusion of multiple myoblasts during
development.
Muscle Fibers (Muscle cells)
18. • Skeletal muscles are surrounded by
layers of connective tissue that
provide structural support and
organization.
• The epimysium surrounds the entire
muscle.
• The perimysium divides the muscle
into fascicles
• The endomysium surrounds individual
muscle fibers within the fascicles.
Connective Tissue layers
19. • Tendons are tough bands of
connective tissue that
attach muscles to bones.
• They transmit the force
generated by muscle
contractions to produce
movement at the joints.
Tendons
20. What are the characteristics of skeletal muscles?
Lesson Checkpoint
21. • Most are attached to tendons and
bones.
• Cells are multinucleate
• Striated
• Cells are surrounded and bundled by
connective tissues
• Covers bony skeleton
Lesson Checkpoint
Answer Key
22. What are the functions of skeletal muscles?
Lesson Checkpoint
23. Remember that the main functions of skeletal
muscle are to contract to produce
movement, sustain body posture and position,
maintain body temperature, store nutrients, and
stabilize joints.
Lesson Checkpoint
Answer Key
24. What are the structure of skeletal
muscle?
Lesson Checkpoint
The main functions of skeletal muscle are to contract to produce movement, sustain body posture and position, maintain body temperature, store nutrients, and stabilize joints.
