Showing posts with label 2010 - snakes - lecture. Show all posts
Showing posts with label 2010 - snakes - lecture. Show all posts

Venomous snakes


VENOMOUS BITES OF SNAKE

Snakes are venomous .They bite with fangs .

Rattle snake are poisanous .Many people die because they get too close to snake, sometimes snakes are harmless like baby sand boas .





MOHAMED Wasim 4°2

Distribution of snakes


Many snakes live in africa ,India, Astralia .
In Africa We can see many snakes .

Diderot Bhuvanesh4°2

snakes

Snakes are dangerous for us. They are cold-blooded. They can be viviparous, oviparous, ovoviviparous. There are many kinds of snakes, there are 2900 snakes species in the world and there are 230 in India and only 30 are dangerous.


DUCHER-Joseph 4°2

Food

The snake who are in the forest eat animals like little snakes, insects, rats and frogs but other snakes eat milk and eggs and sometimes eat their eggs.
Lyrrisha, 4°2

Distribution of Snakes

Snakes live in lots of countries (India,Africa,United States,etc...). There are 2900 snake species in the world but only 270 are in India and only 30 are poisonous. In India, the most poisonous snake is the cobra. In Africa, the most poisonous snake is the rattlesnake. In The United States, the most poisonous snake is the King Cobra and the Kraït which is the Amazon forest.


Sababady Raja 4°2

Reproduction of the snake


Even if, all types of reproduction modes are used by snakes. All snakes use an internal fertilization. To reproduce most of the snakes meet in mid-sping. The male snakes use their tonues to detect pheromones of the fema. There will be a brief fight for the female snake among the male snakes. The male snake has two penises also called heipenses which is located under his tail. And the female has a cloaco. Most species lay eggs, though most snakes abandon their eggs shortly after laying them. But, a unique species like King cobra actually contructs a nest and stay in the area of hatchling after incubation the female King cobra deposit up to 20 to 40 eggs, she will stay with her eggs in every emergencies. When she feels that her eggs are going to hatch, she will leave the nest and find something to eat. So that she doesn't eat her babies.


Hema 4ème 2

FOOD

Certain snakes are in villas they eat eggs and milk. In the forest snakes eat little snakes, small insects, rats and frogs.
Christina 4°2

Shedding


Snakes shed when their skin is too small for them, and then it serve for removing parasites like mites and ticks.
when the snake shed the color of the skin changes. Moulting takes a long time in a snake life so before a moult the snake stops eating and goes to a safer place. And just before shedding the skin becomes dry. The old skin breaks near the mouth and the snake comes out helped by rubbing itself against a rought surface.

Cédric Michel
4°2

Reproduction of snakes

First of all, reproduction is to produce a new human being. Female snakes release phermones so that the male can know that it is the time to reproduce. When the female and the male meet, they reproduce with their sexual organes (male: hemipenis, female: cloaco). There are often fights between males to have the opportunity to reproduce. The strongest gets that opportunity.

Calaimady 4e2


Shedding

Snake skin isn't "flexible", that means that snakes grow up but their skin doesn't. So, they have to get rid of it, that is called: shedding.
Snakes get rid of their skin also to get rid of parasites, which is very intelligent !
But of course, when snakes get rid of their skin, it is replaced directly by another one bigger.

Eva Dojcinovic 4°2

Snake species

The word snake comes from the Old English word: "Snaca".Snakes are cold blooded legless reptiles related to lizards. Snakes belong to the kingdom of Animalia, it's classified in order of Squamata and belong to the superfamily of Varanoidea. There are about 2900 species of snakes in the world, out of which 650 are venemous ones. The ten most deadly snakes are found in Australia. In India, there are 270 species of snakes, out of which 30 are the most poisonous ones. There are 3 varieties of snakes : Arborial: which climb trees, Natatorial:which can swim and Fussorial:which are ground dwelling snakes. Certain snake's venoms are also used as medicines, to save people. Such as : The Malayan Pit Viper's homotoxin venom can be used to threat stroke victims. The King Cobra's neurotoxin venom can be used to treat various forms of pain, cancers, autoimmune and neurological disorders. The Black Mamba's cardiotoxin venom can be used to treat cardiac contraction victims,...etc...etc. Snakes are not only dangeous reptiles, but its venom has many medical values.

By MOUTTOULINGAM Nirmala 4e2.

Venomous

There are 2 varities of snakes
venomous : king cobra , cobra, viper and the most venomous is Russell's viper, king cobra
non venomous: pyton ,rat snake, sand boa ...
If a venomous snakes has bitten you: tie a towel around your arm or leg to stop the bood from circulating, then untie it every 10 min.
by Nazreen, 4ème3

all snakes food




All snakes are carnivorous, eating small animals, birds or insects. Snakes do not chew their food.
Snakes have very flexible lower jaws, the two halves of which are not rigidly attached, allowing them to open their mouths wide enough to swallow their prey whole, even if is larger in diameter their the snakes itself.Contrary to the popular myth, at no point do they "unginge" their jaws ( disarticulate their mandibular joints). After eating, snakes become torpid while the process of digestion takes place.
Kévin 4ème 3

snake food

A boa eats mice, rabbits or chikens. Snakes want their food alive? They like to kill and eat it. All snakes are carnivorous and eat small animals, birds, insects and other invertebrates. In general a snake feeds on any creature. That is their habit. they may change their choice as per the season. If a prey is too small or big of them, they may not go for it.
Indhumathy 4ème3

Mating


Reproduction of Snakes


Snakes find their partner during mating. They mate at the beginning of spring.

The female snakes sends signals which attrack the males.

When many ma

les come, there are fights. At the beginning they move nearer and they have to catch their " enemies" and they have to be on the back of the other snake.

The winner can mate with the female.

When they meet each other, the snakes move to be nearer, and the male crawls along the back on the female. If she is receptive, she is going to have seizures then she will raise her tail for the copulation. The copulation can take 45 minutes to an hour.


A great experience

It was a great experience to see snakes at school! I learned a lot about it. I liked it when I had to touch the snake, it was the first time and it did it to me a strange sensation.
They told us, in India there are 270 differents specise of snakes in India in out of which 60 are venomous. Some look like the same but some can be very dangerous and oters nornal.
They also told us how they can reproduce andwhat they eat.