### body part | organ | organelle | ribosome:

Free ribosome
* are found in the cytosol
  - used for protein synthesis
* make proteins that are used in the cytoplasm
  - stay in the cytoplasm
* synthesize protein that remain inside the cell.

Mitochondrial ribosome
* are similar to bacterial ribosomes.
* resemble prokaryotic ribosomes.
* vary, but are also more similar to prokaryotic ribosomes.

Prokaryotic ribosome
* are different from eukaryotic ribosomes
  - smaller
+ Translation (genetics), Four stages: Molecular biology :: Cell biology
  * Some antibiotics work by keeping translation from happening. Prokaryotic ribosomes are different from eukaryotic ribosomes. So antibiotics can kill bacteria without hurting the eukaryotic host. For example, antibiotics taken by a human might kill the bacteria that is making the human sick but wouldn't hurt the human.

Other organ
* perform functions.
* respond to chemical stimulation

### body part | organ:

Penis
* Most penises carry urine
  - consist of connective tissue
  - fill with blood
* Most penises have erections
  - tubes
* Some penises become glands
  - collect urine
  - enter vaginas
  - grow more when they get hard than other penises
* Some penises have ridges
  - sheaths
  - teeth
* Some penises look like flat tubes
* are appendages
  - capable of pees
  - created by vaginas
* are located in hookers
  - shorts
* are made of cells
  - flesh
* are part of bodies
  - males
  - rather self-maintaining
  - the most private ones
  - used for peeings
* come in a multitude of sizes, shapes, and curvatures
  - all shapes, sizes, colors, and even textures
* force semen.
* includes corpi
  - cuticles
  - dermis
  - epidermises
  - freckles
  - ground substances
  - liver spots
  - lobes
  - mast cells
  - sections
  - skin cells
  - urethras
  - wrinkles
* is an organ
* make constant appearances in myths and legends from all over the map
  - more money than vaginas
* nauseate to ears pig.
+ Penis, Penis size in humans: Anatomy of the male reproductive system
  * The length and thickness of the penis is different for different men. Some penises grow more when they get hard than other penises. In most cases, whether a penis is big or small, it can still be used for sex. It averages out to be around 3 to 6 inches long when not erect.

Reproductive organ
* Some reproductive organs consist of ovaries.
* lie in a false coelom filled with fluid.
* undergo varying degrees of regressive changes.

### body part | organ | respiratory organ:

Book lung
* are believed to be the ancestral type of respiratory organ in arachnids
  - in cavities in the spider's abdomen
  - plates of vascularized tissue, like pages of a book
* provide a large surface area for gas exchange.
* require a circulation system to distribute respiratory gases.

Sense organ
* Some sense organs are near joints
  - leg joints
  - run down sides
* are complex and acute
  - part of sensory systems
* function like biological interfaces between the environment and the organism.
* gather information about the environment.

### body part | organ | sense organ:

Baroreceptor
* quickly respond to small changes in blood pressure.
* send information to the brain about blood pressure.

Chemoreceptor
* are a lot like human taste buds
  - cells that respond to chemical stimuli
  - detectors
  - sensitive to change in stimulus
* exist for both taste and smell.