Lab Activity 5: Muscular System

Vocabulary flashcards covering muscle tissue types, structures, and body muscles from Lab Activity 5.

Muscle tissue

Contractile tissue whose elongated cells or muscle fibers can shorten and thicken to pull attached ends and move body parts.

Skeletal muscle tissue

Muscle tissue made of single, cylindrical, multinucleate muscle fibers with striations caused by myofibril filament arrangement in the sarcoplasm.

Cardiac muscle tissue

Striated muscle tissue found only in the heart, consisting of single-nucleus fibers arranged in a branching system and connected by intercalated disks.

Smooth muscle tissue

Non-striated muscle tissue made of single elongated fibers with a single nucleus, found in organ linings, hollow vessels, and the iris of the eye.

Intercalated disk

A specialized structure connecting cardiac muscle fibers together that rapidly transmits muscle impulses to the next fiber.

Sarcoplasm

The cytoplasm of a muscle fiber containing myofibril filaments.

Multinucleate

Possessing many nuclei within a single muscle cell, as seen in skeletal muscle fibers.

Cranial aponeurosis

A muscle covering structure located on the head.

Epicranius

A muscle of the head that consists of the frontalis and occipitalis.

Frontalis

A head muscle that is a component of the epicranius.

Occipitalis

A head muscle that is a component of the epicranius.

Temporalis

A muscle of the head.

Orbicularis oculi

A muscle of the head located surrounding the eye.

Orbicularis oris

A muscle of the head located surrounding the mouth.

Zygomaticus

A muscle located on the head/face.

Masseter

A muscle of the head involved in mastication.

Buccinator

A muscle located in the cheek region of the head.

Sternocleidomastoid

A major muscle of the torso and neck.

Pectoralis major

A torso muscle located in the chest region.

Rectus abdominus

A torso muscle located in the abdominal region.

External obliques

Torso muscles located on the lateral sides of the abdomen.

Latissimus dorsi

A large muscle located on the back of the torso.

Trapezius

A torso muscle located in the upper back and neck region.

Intercostals

Torso muscles situated between the ribs.

Deltoid

A shoulder-arm muscle covering the shoulder joint.

Biceps brachii

A shoulder-arm muscle located on the anterior upper arm.

Brachialis

A shoulder-arm muscle located in the upper arm.

Triceps brachii

A shoulder-arm muscle located on the posterior upper arm.

Brachioradialis

A shoulder-arm muscle located in the forearm region.

Gluteus maximus

A major leg muscle located in the buttock region.

Sartorius

A leg muscle extending along the thigh.

Adductor group

A group of leg muscles that includes the adductor longus and adductor magnus.

Adductor longus

A leg muscle belonging to the adductor group.

Adductor magnus

A leg muscle belonging to the adductor group.

Gracilis

A leg muscle located on the medial side of the thigh.

Vastus lateralis

A leg muscle forming part of the quadriceps on the lateral thigh.

Rectus femoris

A leg muscle located on the anterior thigh.

Vastus medialis

A leg muscle forming part of the quadriceps on the medial thigh.

Semimembranosus

A leg muscle located on the posterior thigh.

Semitendinous

A leg muscle located on the posterior thigh.

Biceps femoris

A leg muscle located on the posterior thigh.

Gastrocnemius

A leg muscle located in the posterior calf region.

Soleus

A leg muscle located deep to the gastrocnemius in the calf.

Fibularis longus

A leg muscle located on the lateral side of the lower leg.

Tibialis anterior

A leg muscle located on the anterior lower leg.

Calcaneal tendon

A prominent tendon in the posterior lower leg connecting muscle to the heel.