Gross Anatomy - Anatomy

The ulna is the medial bone of the forearm; it articulates with the humerus and radius. The radius is the lateral bone of the forearm. The humerus is the largest bone of the upper limb and is the only bone of the (upper) arm. The tibia is the lower leg's analog of the ulna.

The axillary nerve, along with the posterior circumflex humeral artery and vein, pass through the quadrangular space. The quadrangular space boundaries consist of the teres minor muscle, the surgical neck of the humerus, the superior margin of the teres major, and the long head of the triceps brachii.

The Vagus nerve has both sensory and motor function. The sympathetic and parasympathetic nervous systems are responsible for the "fight or flight" and "rest and digest" actions of the autonomic nervous system respectively. The Vagus nerve is responsible for the parasympathetic motor nerves.

The question is asking for a sensory nerve, meaning we can eliminate the trochlear and hypoglossal nerves. The olfactory nerve is responsible for smell whereas the optic nerve for vision, making the correct answer the optic nerve.

The musculocutaneous nerve arises from the lateral cord of the brachial plexus. It innervates the biceps brachii, the coracobrachialis, and the brachialis muscle. All of these are muscles of the anterior arm.

The crista terminalis is a specialized region in the upper part of the right atrium. It houses the sinoatrial (SA) node, which is responsible for initiating the electrical impulses that cause the heart to contract.

The tricuspid valve separates the right atrium and the right ventricle. The bicuspid, or mitral, valve is located between the left atrium and left ventricle. The pulmonary valve is a semilunar valve that prevents backflow of blood from the pulmonary veins into the right ventricle.

The supine position is a position of the body where the person is lying face up on their back In the prone position, the person is on their stomach and is face down, sometimes with the hands behind the head or neck. Lithotomy position is variation of the supine position with the legs separated, flexed, and supported in raised stirrups.

The mandible is the lowest bone in the face in humans, forming the lower jaw and holding the lower teeth in place. It is commonly known as the jawbone. The manubrium is the superiormost bone in the sternum. The maxilla holds the upper teeth in place.

The frontal bone consists of a squamous, orbital, and nasal part and refers generally to the part of the body known as the "forehead"?

The order of the strata of the epidermal cells from superficial to deep is corneum, lucidum, granulosum, spinosum, germinativum (basale). Note that in thin skin the stratum lucidum is absent.

Skin is the largest organ of the body. It consists of the superficial epidermis, a deeper dermis, and an even deeper fatty layer called the hypodermis. The skin has protective and sensory functions and is important in body temperature regulation, absorption, and production of vitamin D.

The dental formula for a modern human adult is 2:1:2:3 in each quadrant: two incisors, one canine, two premolars, and three molar, for a total of 32 adult teeth. There is some variation in this number, as the third molar (also known as the Wisdom Tooth) is not present in all modern human adults.

The dental formula for a modern human child is 2:1:0:2 in each quadrant: two incisors, one canine, and two molars, for a total of 20 deciduous teeth. There are no premolars in deciduous dentition.

Primary curvature is found in newborns, whereas secondary curvature develops over time. The thoracic and sacral portions of the vertebral column are convex, giving babies a more hunched posture.

Atlas is another term for C1. Its superior articular facets receive the condyles of the occipital bone in the skull, which allows the neck to move backwards and forwards. The axis, or C2, has a superiorly projecting dens that distinguishes it from the atlas.

The hyoid bone acts as an attachment point for many muscles in the neck. When swallowing, the larynx is elevated and the epiglottis is removed from the glottis, allowing matter into the esophagus.

The olecranon is a feature of the ulna. It is commonly known as the elbow. The coracoid process can be found on the scapula and both the deltoid tuberosity and trochlea can be found on the humerus.

The correct answer is the humerus. The patella is the knee cap. The ischium is in the pelvis. The radius and ulna is in the lower arm.