Continuity and derivations of life forms between sponge and human male.

• 
  Orientation : Inside / outside. First stage of poly-cellular organism.
• 
  Animation and coordination : Invention of muscle and nervous cells. Mouth and stomach.
• 
  Swimming worm. Bilateral symmetry. Segmentation. First internal organs.
• 
  Primitive Cephalochordata, formation of the spine. Differentiation of internal organs.
• 
  Skull (with eye) and spine is complete. Vertebrata : the nervous system is complete.
• 
  Formation of the Jaw. - Differentiation of fins. Chondrichthyes stage
• 
  Typical fish - Invention of bones and scales, the fins have complex musculation and articulations. The lateral fins will evolve to become limbs.
• 
  The fins evolve to fleshy members. Apparition or differentiation of lungs? First land movements?
• 
  Formation of the neck. Fingers appear - movement and prehension ability.
• 
  Land conquest. Lungs are functional, but the animal is still water-dependent for reproduction. (this one should be a salamander, not a lizard, but the general outlook is OK)
• 
  Dry skin and water-independence of Amniote. (this one should be a lizard, not a salamander, but the general outlook is OK)
• 
  Hair and gestation invention. Primitive Mammalia are insect-eaters and are basically "hairy lizards"... this one's cute, isn't it?
• 
  Living in trees, our ancestors gained an opposable thumb and binocular frontal vision.
• 
  (I needed an intermediary picture for smoother transition, so...) Higher monkey - social interaction and communication probably increased at that time. Ability to awkwardly walk on two feet.
• 
  (I needed yet another intermediary picture for smoother transition, sorry) Our nearest cousin - lost its tail, by the way.
• 
  Vertical position frees the hands. Brain volume increases, and larger in proportion to total body volume. Loss of body hair around the same time as clothing invented.

I, the copyright holder of this work, hereby publish it under the following licenses:

Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled GNU Free Documentation License.http://www.gnu.org/copyleft/fdl.htmlGFDLGNU Free Documentation Licensetruetrue

This file is licensed under the Creative Commons Attribution-Share Alike Attribution-Share Alike 4.0 International, 3.0 Unported, 2.5 Generic, 2.0 Generic and 1.0 Generic license.

You are free:

• to share – to copy, distribute and transmit the work
• to remix – to adapt the work

Under the following conditions:

• attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
• share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.

https://creativecommons.org/licenses/by-sa/4.0CC BY-SA 4.0 Creative Commons Attribution-Share Alike 4.0 truetrue

You may select the license of your choice.