Welcome to the Living World

Flea: external view

Morpho rhetenor 

A lifespan of an eyelash is approximately 150 days. A Russian man who wore a beard during the time of Peter the Great had to pay a special tax. A survey done by Clairol 10 years ago came up with 46% of men stating that it was okay to color their hair. Now 66% of men admit to coloring their hair.  After you die, your body starts to dry out creating the illusion that your hair and nails are still growing after death.  An average human scalp has 100,000 hairs.  An average woman has 17 square feet of skin. When a woman is in her ninth month of pregnancy she has 18.5 square feet of skin. Ancient Egyptians used to think having facial hair was an indication of personal neglect. Approximately 25% of all scald burns to children are from hot tap water and is associated with more deaths than with any other liquid. Blondes have more hair than dark-haired people do. Brylcreem, which was created in 1929, was the first man's hair product. During a 24-hour period, the average hum

AMAZING FACTS ABOUT OUR EYES

Phylum Excretory organ Porifera No. Diffusion through body surface Cnidaria No. Diffusion through body surface Ctenophora No. Diffusion through body surface Platyhelminthes Protonephredia (Flame cells) Nemathelminthes Renette cells Annelida Oligochaetes Nephredia (Metanephredia) Polychaetes Protonephredia and metanephredia Arthropoda Crustaceans Antennary (Green) glands Arachnids (spiders, scorpions etc), Limulus Coxal glands Insecta, chilopods, diplopods Malpighian tubules Mollusca General Metanephredia Fresh water mussel Organs of Bojanus, Keber’s organs Echinodermata Dermal branchiae Hemichordata Proboscis gland Chordata Urochordata Neural glands Cephalochordate Protonephredia with solenocytes Vertebrata Kidney Amphioxus

Phylum Respiratory organ Porifera Body surface Cnidaria Body surface Ctenophora Body surface Platyhelminthes Body surface Nemathelminthes Body surface Annelida Skin (integument) Arthropoda Aquatic insects (mayflies, nymphs etc) Tracheal gills Damselfly nymphs Caudal gills Limulus Gill books Scorpion, some spiders, Scutigera and chilopods Book lungs (Diffusion lungs) Insects, some spiders Trachea Some crabs (e.g. coconut crabs) Branchiostegal lung (gill-like lung) Mollusca Skin (Cutaneous) Aquatic forms Ctenidia (gills) Terrestrial forms Pulmonary sacs (lungs) Echinodermata Dermal branchiae (skin gills) H

Download Free Biology Books : 'via Blog this'

   4. ANIMAL KINGDOM Animals are multicellular and heterotrophic organisms without cell wall and chlorophyll. Kingdom Animalia includes 11 major phyla: 1.  Porifera 7.   Arthropoda 2.  Cnidaria 8.   Mollusca 3.  Ctenophora 9.   Echinodermata 4.  Platyhelminthes 10. Hemichordata 5.  Aschelminthes 11. Chordata 6.  Annelida   BASIS OF CLASSIFICATION 1. Levels of organization Based on this, animals are grouped into four levels: a.    Cellular level of organization: Here, the cells are arranged as loose cell aggregates. E.g. Porifera. b.    Tissue level of organization: Here, the cells are arranged into tissues. E.g. Cnidarians and Ctenophores. c.    Organ level of organization: Here, tissues are arranged into organs. E.g. Higher animals (Platyhelminthes to chordates). d.    Organ system level of organization: Here