### structure | shelter:

Tent
* Most tents are made of flexible materials
* Most tents have an external fly that covers the roof and walls of the tent
  - canvas walls
* are among the oldest forms of shelter
  - capable of shelter
* are located in backpacks
  - state parks
  - such materials
  - temporary shelter
  - the most common form of shelter used on the mountain
* are used for camping
  - shelter or as resting places
  - web
* come in a variety of shapes and sizes
  - on sizes
  - all shapes and sizes
* have canvas walls
  - frameworks
  - height
* includes bases.
* includes guy cables
  - ropes

### structure | shelter | tent:

Tepee
* are habit forming
  - lodges
  - made from long poles, and are covered with material
  - triangle shaped homes that are made out of tanned buffalo skin
  - very light and easy to move around
+ Tipi: Native American
  * Tepees are made from long poles, and are covered with material. Long ago the material was animal skin or tree bark. Today, they are made from cloth.

Tornado shelter
* are safest if they are underground.
* can save lives.

Shoebox
* are boxs
  - structures
* contain school supplies and toys for the children.
* database management program designed especially for use by field linguists
  - program oriented to the needs of a field linguist's dictionary
* work well for tiny birds.

Showroom
* are large rooms.
* are located in automobile dealerships
  - cities
  - stores
  - theaters
  - public places
  - used for new cars
  - sections
* is an area

Similar structure
* are formed by algae and some fungi.
* exist in many other parts of the earth.
* help keep the fetus cool during pregnancy in the female cetacean.
* occur in other protist groups and are called flagellar pits.
* serve purposes.
* serve same purposes
  - ultimate purposes

### structure:

Sinus
* Some sinuses appear to perform an important function in cooling the brain.
* also help warm and humidify the air that passes through the nose.
* appear compressed in some areas but the subcapsular sinuses are open.
* are air spaces in the bones behind and above the nose.
* are air-filled cavities in the skull
  - spaces in the skull around the nose
  - between the eyes and right underneath the brain
  - body parts
* are hollow air spaces in the human body
  - skull and bones of the face
  - spaces, of which there are many in the human body
  - spaces or cavities in the bone and there are many throughout the body
  - part of the nasal air and membrane system that produces mucus
  - solid objects
  - the hollow air spaces in the front of the skull
* contain brown or greenish black material.
* have mucus drainage pathways that can become acutely or chronically obstructed.
* usually drain properly, unless there is an inflammation or infection.

### structure | sinus:

Maxillary sinus
* are sinuses.
* continues pneumatization throughout life.
* makes pain in the upper teeth and cheek, and sometimes eye pain as well.
* polyps secondary to dental extraction.

Skeletal structure
* is child-like, with spindly limbs generally elongated beyond human proportions.
* provide evidence
  - indirect evidence

### structure | skeletal structure:

Spinal column
* is flexible.
* skeletal structure