### body part | vesicle | follicle:

Primordial follicle
* Some primordial follicles do eventually develop.
* are immature primary oocytes surrounded by a single layer of granulosa cells
  - indiscernible to the naked eye

Secondary follicle
* Some secondary follicles have layers.
* are the result of antigen recognition by B cells in a primary follicle.
* develop following antigenic stimulation.

Small vesicle
* Most small vesicles fill with toxins.
* Some small vesicles contain food
  - proteins
* break off and move toward the cell membrane.
* coalesce to form larger blisters.
* containing terpenoids accumulate in the cytoplasm.

Synaptic vesicle
* are containers for neurotransmitters.
* retain their identity through the endocytic cycle.

Transport vesicle
* bud off from endoplasmic reticulum.
* carry soluble proteins and membranes between intracellular compartments.

Villus
* Most villuses absorb nutrition.
* Some villuses absorb nutrients
  - have surfaces
  - penetrate walls
* includes corpi.

### body part | villus:

Chorionic villus
* biopsy in first trimester pregnancy for prenatal genetic diagnosis.
* sampling and amniocentesis are the two most common methods of prenatal diagnosis.

Waist
* Most waists are part of bodies.
* are areas
  - body parts
  - drawstrings
  - torsos
  - solid objects
* is an area

### body part:

Whisker
* Most whiskers detect vibration.
* Some whiskers have structures.
* also aid in hunting
  - reduce ductility and fracture toughness
* are also part of the cat's touch sensory mechanism
  - extremely sensitive because they are closely connected to the nervous system
  - hair
  - more than twice as thick as ordinary hairs
  - never all black, some are white or partly white
  - part of cats
  - present on the snout and above the eyes
  - singed off, fur is singed
  - so sensitive that they can detect the slightest directional change in a breeze
  - the same shade of brown as the coat
  - thick, long hairs on each side of a cat's face
  - two to three times thicker than the cat's hair
* become more important to blind cats to judge the cat's proximity to an object.
* can be metallic or inorganic compounds
  - very short or missing
  - cause electrical malfunctions by bridging circuit elements
* extend from sides.
* grow on tin, zinc, cadmium, and silver and can grow long enough to short out circuitry.
* has no front claws only back.
* have a considerable assembly of dedicated nerves that go direct to the brain.
* help a cat measure the width of an opening
  - navigate at night and help it determine if it can fit through small spaces
  - cats avoid obstacles, even in total darkness
* is hair
* mean different things to different animals, but they are always there for a reason.

### body parts:

Human bone
* are body parts
  - bones
  - hard, calcified structures with caverns that hold the living bone cells
  - stronger than concrete
* can withstand stresses of twenty-four thousand pounds per square inch.
* contain calcium.
* lay just centimeters from the surface.

### body parts:

Human ear
* Most human ears detect sound.
  - good at hearing low pitches , but bad at hearing high pitches
* can detect a range of sixteen to thirty thousand vibrations per second.
* has three important parts.
* hear only a small segment of the frequency spectrum as sound.
* need protection.
+ Discrete cosine transform, Sounds: Technology
  * Human ears are good at hearing low pitches, but bad at hearing high pitches. If you use the DCT to break a sound into tones, you do not need to be as careful when playing the higher tones because people cannot hear them as well.