Questions and Answers
What does the term 'frontalis' refer to?
Define 'orbicularis oris'.
Kissing and duck face
What is the function of the 'zygomaticus major'?
Gives your smile
What is the function of the 'masseter'?
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What does 'latissimus dorsi' refer to?
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What is the role of the 'gluteus maximus'?
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Define 'pectoralis major'.
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What muscle is described as 'slender muscle in the inner thigh'?
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What is the definition of 'sartorius'?
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Define 'gastrocnemius'.
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What does the term 'achilles tendon' refer to?
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The connective tissue that holds the abs together is called the _______.
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What is the function of the 'extensor digitorum'?
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What does 'tibialis anterior' refer to?
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Study Notes
Facial Muscles
- Frontalis: Raises eyebrows, contributing to facial expressions.
- Orbicularis oris: Responsible for movements associated with kissing and forming a duck face.
- Zygomaticus major: Aids in smiling, giving the facial expression its characteristic quality.
Neck and Jaw Muscles
- Occipitalis: Located at the back of the head, assists in moving the scalp.
- Sternocleidomastoid: Flexes and rotates the head, essential for head movement.
- Masseter: The primary muscle used for chewing; crucial for biting and grinding food.
- Temporalis: Another muscle involved in chewing, aiding in the elevation of the jaw.
Upper Body Muscles
- Trapezius: Supports arm movement and helps stabilize the shoulder.
- Latissimus dorsi: Known as the "batwings," important for shoulder adduction and extension.
- Deltoid: Located in the shoulder, responsible for abducting the arm toward the midline.
- Pectoralis major: Major muscle of the chest, involved in the movement of the shoulder joint.
Core and Abdominal Muscles
- Serratus anterior: Known as “shark gills,” aids in the movement and stabilization of the scapula.
- Intercostal muscles: Assist in respiration by expanding and contracting the rib cage.
- Diaphragm: Dome-shaped muscle that plays a key role in respiration, contracting to allow air to enter the lungs.
- Linea alba: A fibrous structure that connects the rectus abdominis muscles along the midline.
Arm and Forearm Muscles
- Triceps brachii: Main extensor muscle of the elbow, opposing the biceps brachii.
- Biceps brachii: Key flexor of the arm at the elbow.
- Extensor digitorum: Located on the posterior side of the forearm, extends the fingers.
- Brachioradialis: Located on the anterior side of the forearm, important for flexing the elbow.
Lower Body Muscles
- Sartorius: Longest muscle in the body, resembles a seatbelt; involved in hip and knee flexion.
- Rectus femoris: The main muscle of the quadriceps, essential for knee extension.
- Gracilis: A slender muscle found in the inner thigh, aids in hip adduction.
- Adductor longus: Responsible for moving the leg away from the midline.
Hamstring Muscles
- Biceps femoris: The primary muscle of the hamstrings, involved in knee flexion.
- Semitendinosus: Located alongside the biceps femoris, involved in flexing the knee.
- Semimembranosus: Another hamstring muscle, assists in knee flexion.
Calf Muscles
- Gastrocnemius: Prominent calf muscle, plays a key role in plantar flexion of the foot.
- Soleus: Located beneath the gastrocnemius, also involved in plantar flexion.
- Achilles tendon: Connects calf muscles to the heel, essential for walking and running.
Shin Muscles
- Extensor digitorum longus: A slender muscle in the shin that extends the toes.
- Tibialis anterior: Thick muscle located in the front of the shin, responsible for dorsiflexion of the foot.
Eye and Nose Muscles
- Orbicularis oculi: Muscle that surrounds the eye and enables blinking and squinting.
- Nasalis: A muscle that aids in the flaring of the nostrils.
- Triangularis: Positioned around the mouth, assists in the downward movement of the corners of the mouth.
General Muscular Features
- Extensor retinaculum: A connective tissue band that stabilizes the tendons of the extensor muscles in the lower leg.
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Description
Test your knowledge of the muscular system with these flashcards. This quiz focuses on key muscles such as the frontalis, orbicularis oris, and masseter, providing definitions and functions. Perfect for students looking to enhance their understanding of human anatomy.
