7th Grade Science, Vocabulary
Terms
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- Air conducting tube that connects the larynx with the bronchi. Is lined with mucous membranes and cilia and contains strong cartilage rings
- Trachea
- Tube that carries urine from the bladder to the outside of the body
- Urethra
- Airway to which the vocal cords are attached
- Larynx
- Lung disease in which the alveoli enlarge
- Emphysema
- Elastic, muscular organ that holds urine until it leaves the body through the urethra
- Bladder
- Muscle beneath the lungs that contracts and rlaxes to move gasses in and out of the body
- Diaphragm
- Tiny filtering unit of the kidney
- Nephron
- Waste water that contains excess water, salts and other wastes that are not reabsorbed by the body
- Urine
- Two short tubes that branch off the lower end of the trachea and carry air into the lungs
- Bronchi
- Bean shaped urinary system organ that is made up of 1 million nephrons and filters blood, producing urine
- Kidney
- Lung disorder in which the bronchial tubes contract quickly and cuase shortness of breath, wheezing or coughing; may occur as an allergic reaction
- Asthma
- Tube that carries urine from each kidney to the bladder
- Ureter
- System of excretory organs that rids the blood of wastes, controls blood volume by removing excess water and balances concentration of salts and water
- Urinary system
- Tiny, thin-walled grapeike cluster at the end of each bronchiole that are surrounded by capillaries, where carbon dioxide and oxygen exchange takes place
- Alveoli
- Tubelike passageway for food, liquid and air
- Pharynx
- process that a seed undergoes to become a plant
- termination
- transfer of pollen graines from the stamen to the ovules
- pollination
- underground stem on a fern
- rhizome
- structures where ferns produce spores
- sori
- male reproductive organ of a flower; consists of an anther and a filament
- stamen
- contain an egg cell, food-storage tissue and a sticky fluid
- ovules
- swollen base of pistil; where ovules form
- ovary
- These contain the sperm-producing parts in seed plants
- pollen grains
- A fern spore can grow into a small, green heart-shaped gametophyte plant called what
- prothallus
- are mosses vascular or non-vascular
- Nonvascular
- The prothallus contains what to help make its own food
- chlorophyll
- Pollination involves the transfer of what from the flower's stamen to its stigma
- pollen
- What is the male reproductive organ
- stamen
- What is the female reproductive organ
- pistil
- What are the pollen grains carried by
- wind, rain and animals
- What is the sticky part of the plant's pistil
- stigma
- What travels down the pollen tube to fertilize the egg
- sperm
- Following fertilization, the female part develops into what
- a seed
- When cells form having a diploid number of chromosomes
- sporophyte stage
- haploid cells reproduced when cells in reporductive organs undergo meiosis
- spore
- When cells form having a haploid number of chromosomes
- gametophyte stage
- brightly colored part of a flower
- petal
- covers the bud of the flower
- sepal
- stalk of male organ
- filament
- where pollen grains form
- anther