### molecule | fat | edible fat:

Lard
* contain long LTRs and a long, conserved internal domain that shows no protein coding capacity.
* is edible fat

### molecule | fat | edible fat | shortening:

Muscle contraction
* Most muscle contraction causes sound
  - creates forces
* Some muscle contraction causes damage
  - muscle damage
  - significant muscle damage
  - generates heat
* are mechanical actions resulting from biochemical signals and changes.
* happens because of chemical messages made by nerves of that muscle.
* is believed to occur through interactions of the myosin and actin
  - due to the of from the whereas muscle relaxation is due to the of from the
  - in the buttocks
  - one of the most dramatic examples of motor function
  - produced by the sliding of actin filaments against myosin filaments
* move the waste to the rectum.
* occurs when muscle fibers get
  - the myosin heads rotate and pull on the actin filaments
* reduces the length of each sarcomere.
* requires a great deal of energy
  - fuels, one of which is glucose
  - the presence of water
* seems to be similar to the sliding filament model seen in vertebrate muscles.
+ Physiology
  * Physiologists can study how organs of an organism work together to make things happen. In human beings, for example, the digestion of food hormones and other chemicals are made by the stomach, liver, and pancreas. Muscle contraction happens because of chemical messages made by nerves of that muscle. By learning how the body functions normally, physiologists and physicians can better understand what happens when organs do not function normally. For example, an understanding of how the thyroid gland functions has helped in treating goitre. Studies of the circulatory system and the nervous system have helped physicians understand and treat such illnesses like heart disease, stroke, and high blood pressure.

Muscular contraction
* Most muscular contraction is caused by stimulation.
* cause the lymphatic vessels to contract and propel fluid.
* causes forces.
* compresses the veins, causing blood to return to the heart.
* force urine through exit tube called urethra.
* move the food down the esophagus to the stomach.
* produce undulations which allow some to swim.
* provide for sperm transport to oviducts.
* requires energy.

### molecule | fat | edible fat | shortening:

Shearing
* also suppresses humidity, a factor in larval survival, in the wool.
* are cuts.
* can have a minor effect on birth weight, particularly in twins.
* destroys the natural form of the plant.
* involves the heading of the current year's shoot growth and differs from pruning.
* is actually the culmination of a year of management, selection and breeding decisions
  - also a kind of pressure injury
  - caused by forces sliding by each other
  - considered essential for producing trees with full foliage and uniform symmetry
  - localized in the two zones near the top and bottom of the field
* is the complete removal of the wool and is carried out using machine or hand shears
  - indiscriminate clipping of all twig ends on the plant
  - method of choice for woolly and crossbred llamas and for alpacas
* makes breeding easier and safer for the male as well as the female.
* produces a dense outer layer of foliage that shades the inner wood and results in dieback.