





DIGESTIVE SYSTEM
RESPIRATORY SYSTEM
CIRCULATORY SYSTEM
EXCRETORY SYSTEM
VERTEBRATES AND INVERTEBRATES
THE PROCESS OF NUTRITION
the animal kingdom is so huge and varied that it is very difficult to summarise how the different processes are carried out.
All animals need take food from their environment, all animals need to process the food in order to extract the nutrition elements. The processing of food takes place in the digestive system. Animal digestive system iis made up of a length of tube whish the food runs throught and in whish the food is transformed. Birds and mammals have a more complex digestive system than invertebrates whose system is much more simple or even not-exist, as in the case of sponges.
Animals also need to take oxygen from their environment, animals have a variety of differents respirator organs fish and many aquatic invertebretes have gills, insects have small tubes called trachea, and amphibeans, reptiles and mammals have lungs.
Plants absorb nutrients and water through their roots, but photosynthesis — the process by which plants create their fuel — occurs in the leaves. Therefore, plants need to get fluids and nutrients from the ground up through their stems to their parts that are above ground level.
reptiles drink water
It is best to provide water in a large shallow dish. Many reptiles need to soak in order to shed their skin appropriately. To avoid drowning (especially with neonates and tortoises), it is important that the reptile can exit the water bowl safely and with ease.
we can drink salt water?
no, becos our desidrate.
how dromedary camel save water
they save thewater in yours stomage
ANIMALS NEED WATER TO SURVIVOR
some animals, like the dromedary camel can last for several days withouth talking water but even these animals need water after a certain time.
animals can obtain water in two aways:
a. from food
a. from their surroundings
A pure substance is a form of matter that has a definite composition and distinct properties. It may consist of only one type of atoms (examples: Fe(s), N2(g), S8(s)), or of only one compound where the atoms are connected in a defined way, (examples: FeS(s), CH4(g), NaNO3(s), H2O(l)). Many substances called “pure” in everyday life like “Pure Honey”, “Pure Silk” etc. are not pure in a scientific sense but they are mixtures. A homogeneous substance has the same composition and properties throughout the sample (down to microscopic but not to atomic dimensions). A phase is a homogeneous section of matter. It can be: A heterogeneous substance consists of two or more phases. Solutions are homogeneous mixtures (one phase only) of two or more components. We distinguish: In liquid solution one may distinguish the solvent, the main part of the solution, and the solute, the substance dissolved in the solvent. The solute may be gaseous, liquid or solid.
There is no easily detectable, obvious difference between a solution and a pure substance. Only the identification of the components (e.g. by separation techniques) proves a sample to be a homogeneous mixture and not a pure substance. |
solid/solid mixtures
liquid/liquid mixtures - these are called emulsions. Thery are often oil and water type emulsion.
The General Properties of Matter
1. Mass- very common to all matter. Mass does not change unless divided or removed to a body of matter.
2. Weight- it depends in the attraction of the pull of gravity thus, it changes from place to place.
3. Impenetrability- there are no two things that can occupy the same space.
4. Inertia- a matter that is at rest will remain at rest but can only be moved when external force is applied.
5. Porosity- states that matter has pores.
6. Form and shape- where we can distinguish what kind of matter is the thing observed.
7. Volume- capacity or space occupied.
material of The General Properties of Matter is of http://wiki.answers.com/Q/Teture_shape_size_and_color_are_all_examples_of_properties_of_matter
A lunar eclipse occurs whenever the Moon passes through some portion of the Earth's shadow. This can occur only when the Sun,Earth, and Moon are aligned exactly, or very closely so, with the Earth in the middle. Hence, there is always a full moon the night of a lunar eclipse. The type and length of an eclipse depend upon the Moon's location relative to its orbital nodes. The next total lunar eclipse occurs on December 21, 2010. The next eclipse of the Moon is a penumbral eclipse on July 7, 2009.
The shadow of the Earth can be divided into two distinctive parts: the umbra and penumbra. Within the umbra, there is no direct solar radiation. However, as a result of the Sun's large angular size, solar illumination is only partially blocked in the outer portion of the Earth's shadow, which is given the name penumbra.
A penumbral eclipse occurs when the Moon passes through the Earth's penumbra. The penumbra does not cause any noticeable darkening of the Moon's surface, though some may argue it turns a little yellow. A special type of penumbral eclipse is a total penumbral eclipse, during which the Moon lies exclusively within the Earth's penumbra. Total penumbral eclipses are rare, and when these occur, that portion of the Moon which is closest to the umbra can appear somewhat darker than the rest of the Moon.
A partial lunar eclipse occurs when only a portion of the Moon enters the umbra. When the Moon travels completely into the Earth's umbra, one observes a total lunar eclipse. The Moon's speed through the shadow is about one kilometer per second (2,300 mph), and totality may last up to nearly 107 minutes. Nevertheless, the total time between the Moon's first and last contact with the shadow is much longer, and could last up to 3.8 hours.[1] The relative distance of the Moon from the Earth at the time of an eclipse can affect the eclipse's duration. In particular, when the Moon is near its apogee, the farthest point from the Earth in its orbit, its orbital speed is the slowest. The diameter of the umbra does not decrease much with distance. Thus, a totally-eclipsed Moon occurring near apogee will lengthen the duration of totality.
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