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Anatomy

Male Surface Anatomy
Male ext genitalia
Penis
Foreskin
Scrotum
Skin

Female Surface Anatomy
Female ext genitalia
Mons
Vulva
Breasts

Skin

Urogenital System
Kidneys
Urinary Tract
Ureters
Bladder
Prostate
Urethra

Spermatic Duct
Testicles
Vas deferens
Ductus deferens
Seminal vesicles
Ejaculatory ducts

Female int genitalia
Uterus
Ovaries
Fallopian tubes
Vagina

Skeletal System
Head
Skull
Orbits
Mandible
Cranium
Zygomatic arches
Cheek bones
Scapula
Colar bone
Ribs
Vertebral column
Cervical vertebrae
Atlas
Axis
Thoracic vertebrae
Lumbar verebrae
Sacral vertebrae
Sacrum
Coccyx
Pelvis
Hip bone
Legs
Femur
Tibia
Fibula
Feet
Tarsals
Metatarsals
Phalanges
Arms
Humerus
Radius
Ulna
Hands
Carpals
Metacarpals
Phalanges

Muscular System
Smooth muscle

Heart
Tongue
Muscles within arteries
Skeletal muscle
Facial muscles
Neck
Sternocleidomastoid

Chest
Pectoral muscles
Pecs

Diaphragm
Stomach
Abdominals
Abs
Rectus abdominis
External oblique
Internal oblique
Transversus abdominis

Shoulders
Deltoids
Delts

Arms
Biceps
Triceps
Forearms
Extensors
Flexors

Legs
Thigh muscles
Quadriceps
Quads

Lower leg muscles
Calves

Back
Trapezius
Traps
Latissimus dorsi
Lats
Erector spinae muscles
Correct Posture

Cardiovascular System
Vessels

Heart

Respiratory System
Mouth & Pharynx
Larynx
Lungs
Trachea

Diaphragm

Digestive System
Mouth & Pharynx
Esophagus & Stomach
Small intestine
Large intestine
Rectum & Anal canal
Liver
Gall bladder
Pancreas

Nervous System
Nerves
Spinal cord
Senses

Brain
Eyes
Ears
Nose
Tongue

Endocrine System
Pituitary gland
Thyroid gland
Parathyroid glands


Skeletal System

Bones by Name
User's Manual
Amazing Facts
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Anatomy Control Panel

Your skeletal system breaks many rules of architecture. The 22 fused skull bones, providing a crash helmet for your brain, make your skeleton top heavy. The entire skeletal structure balances on a few square inches of bone at the bottom of your feet. Even with these design challenges, the structure of your bones accomplishes amazing feats of engineering. The skeleton is extremely light providing agility, while also providing amazing strength. The design of the lower limb bones allows your center of gravity to remain above your hips allowing smooth walking as opposed to a side to side gait exhibited in other animals. This along with highly responsive sensory organs and an advanced brain make it easy to balance on a few square inches of bone.

Each bone is composed of struts and arches with spaces in between. The spaces make the bones light. The struts and arches are arranged to direct stress to the strongest areas of the bone. The Eiffel tower is designed the same way, as it stands on 2 feet and its struts direct stress to the iron legs where it holds the most strength. Any shock or stress applied to the bone causes a layer of liquid bone to form where its needed while those parts that don't receive stress are dissolved by bone destroying cells. The nutrients of the dissolved bone material can then be recycled in order to strengthen the bone where it needs it most. This is how weight-bearing exercise strengthens bone, while sedentary behavior weakens it.

Bones by Name
Some of the bones, like the cranium are made up of many smaller fused bones. However, we won't get carried away with details. Here's a good start.

 


Bones are the framework that will support every pound of your body for the rest of your life. Developing good habits now will help you get through periods of old age that can be real problems for bones.

Add calcium regularly. You need to consume about 1000mg of calcium per day. Most people are lacking about 250mg of calcium per day. You can make up the difference with one 8oz. glass of skim milk per day, which provides about 350 mg of calcium. If you can't stand the stuff or are lactose intolerant, try milk substitutes or calcium rich juice. For most of you, the majority of your day is not spent doing physical labor, so the best way to ensure strong bones is to regularly lift weights. Other weight bearing activities, such as walking, running, tennis or basketball, help strengthen bone as well. A full body weight lifting workout strengthens bone, while aerobic exercise primarily serve to maintain existing bone. Make sure to target the hips and back within your full body weight lifting workout, since these areas are most vulnerable to bone loss. Wear comfortable, well-supported, well-fitted, well-made shoes, and when they look like they've been through hell and back, replace them with new ones. Girls, those high heal torture devices you call shoes should not be your every day shoes. Tight fitting shoes can cause ugly and sometimes painful corns, bunions and other painful foot conditions.

 

  • There are 206 distinct bones in the body.
  • The hipbone is composed of 6 smaller bones.
  • Your pelvis is composed of your hipbone and the last fused vertebrae called your sacrum.
  • There are 230 joints in the body.
  • The femur is the longest bone in the body.
  • 26 bones are in the foot.
  • 22 fused bones makeup the skull that protects your brain.
  • One in 20 people has an extra rib.
  • Landing from a jump exerts half a ton of force within your femur. This is enough force to shatter granite!
  • The design of the Eiffel tower is based on the design of human bone.


Nutrition: Calcium

Skeletal muscles

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