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🖐️ Ever wondered how the hand’s joints and bones are organized?

We’ve broken it down into 2 diagrams for you:

Slide 1: Joints of the hand

🔹 Joints are named after the bones that form them (e.g. carpometacarpal joint)
🔹 Digits 2–5 → two interphalangeal joints: proximal & distal
🔹 Thumb → one interphalangeal joint

Slide 2: Bones of the hand (palmar view)

Hand bones are divided into 3 groups:
🔹 Carpals = wrist bones
🔹 Metacarpals = palm bones
🔹 Phalanges = finger bones

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Slide through to learn the essentials about the facial artery 🩸

🔹 Origin: arises from the external carotid artery
🔹 Branches: includes the inferior labial, superior labial, lateral nasal, and angular arteries
🔹 Supply: nourishes the skin and muscles of the face, lips, and nose

Want to keep building your anatomy knowledge? Register for free at Kenhub today: https://khub.me/7jggnc

Tendons connect muscle to bone, while ligaments connect bone to bone. It’s a simple difference, but an important one to remember.

Learn more about tendons and ligaments with our Skeletal System study unit (with a video, interactive quiz, labeled images and articles): https://khub.me/33kbkz

The bones of the human skeleton can be classified by their shape into five types:

🔹 Long bones are usually tubular in shape and have two ends articulating with other bones.

🔹 Short bones are commonly cuboidal in shape and usually as long as they are wide.

🔹 Flat bones are flat and thin bones and have fibrocartilage covering their articular surfaces. They function to protect internal organs.

🔹 Irregular bones have a variable and irregular shape, which aids in protecting internal structures.

🔹 Sesamoid bones are small and oval in shape. Sesamoid bones are found at the end of long bones and are embedded within tendons.They help in manipulating the angle of the osteotendinous insertion, redistributing mechanical forces throughout the muscle or tendon.

If you want to learn anatomy and physiology faster, register for free at Kenhub today: https://khub.me/k9laia

Why do cold temperatures, fear, or even an emotional song give us goosebumps?

The answer lies in the arrector pili muscle, a tiny muscle attached to the base of each hair follicle. When cold or strong emotion activates the sympathetic nervous system, this muscle contracts. The hair stands upright, the surrounding skin rises, and a goosebump forms.

This reflex was more useful to our hairier ancestors. Raised hairs could trap warm air close to the skin and make the body appear larger when facing a threat. Humans have much less body hair today, so the reflex no longer provides the same benefits, but it remains part of our physiology.

Click the link in this post to access the free integumentary system study guide article, where you’ll find a full atlas, labelled diagrams, a quiz, and videos to help you learn: https://khub.me/5u5lfd

The auditory tube connects the middle ear to the nasopharynx and helps equalize pressure across the tympanic membrane. This is why your ears may “pop” during flights, altitude changes, or when you swallow. 👂

We’ve put together a free study guide article to help you learn this topic faster and understand the main parts of the auditory tube more clearly.

Access it here: https://khub.me/2kosjr

Sterno-bla-bla! It’s not an easy word to say. Oh but when you do… 😎