18 votes

How can I make two hearts work?

Vasoconstriction The actual volume of blood in the heart itself isn't particularly large -- only about 0.25 L. A reasonable puddle, but it's not going to kill you to lose it. (It's less than a ...
R.M.'s user avatar
  • 2,637
12 votes
Accepted

How biologically plausible is my snake species?

The largest snake to ever exist in real life was Titanoboa — at the very absolute maximum 15 meters long, 1$\frac{1}{4}$ metric tons, and a meter wide. From this several conclusions can be drawn. The ...
KEY_ABRADE's user avatar
  • 12.8k
7 votes

Anatomical requirements for human speech

I don't think there are any hard limits. To start with the vowels, all you need is vocal cords, vibrating at a fixed frequency, and a tongue flexible enough to get the oral cavity into a shape with ...
Kostya_I's user avatar
  • 686
7 votes

How biologically plausible is my snake species?

@KEY_ABRADE has already given a great answer, but I wanted add one point. Overcoming the mechanical problems of such a large snake might be helped by making it aquatic or semi-aquatic. The largest ...
WaterMolecule's user avatar
6 votes
Accepted

Debris protection for spiracle-like breathing holes, except 'nose' hair

Bagless vacuum cleaners have had to solve this. At least some of them use two-step method: cyclone to separate coarse stuff and filters to remove fine-grain stuff. The cyclone creates a vortex that ...
Jani Miettinen's user avatar
6 votes

Anatomical requirements for human speech

A little bit of a frame challenge here I know you want to stick closely to the human way of making sounds but you really don't have to. You don't need everything we have. Crows and parrots are able to ...
Pelinore's user avatar
  • 9,119
5 votes

How can I make two hearts work?

Have two independent cardiovascular systems. The simplest recipe is to have each pump blood through one side of the body. This is very scientifically plausible - symmetry is very common in nature, the ...
Therac's user avatar
  • 4,918
3 votes

How can I make two hearts work?

Put them in sequence, one usually in restmode, allowing just throughflow. In extreme stress, both hearts get active, by syncing up the heartbeats. But then the blood pressure waterhammer https://en....
Pica's user avatar
  • 2,140
3 votes

How can I make two hearts work?

that's why they wear all that bulky armor, silly now I can't be sure about Klingons, but sangheili and space Marines sure do have a lot of protective gear... but in all seriousness, I don't think ...
alkahest's user avatar
  • 545
3 votes

A brood parasite that mimics humans, plausible?

This is a frame challenge. Homo sapiens corporativa Also know as Bastard CEO, Pathological Liar From Finances, Career Politician, Corrupt Religious Figurehead or WEB3 Innovator Not to be confused ...
Mermaker's user avatar
  • 8,575
2 votes

Where to place breathing holes/spiracles on a bipedal humanoid

I've seen Avatar, but know nothing of its backstory. I did notice the respiratory system of some of the animals. I imagined it functioned more of the way avian lungs operate. Where air sacs act like ...
Gillgamesh's user avatar
  • 5,828
2 votes

How can I make two hearts work?

There are real animals with multiple hearts, various arrangements. No need to speculate.
John Doty's user avatar
  • 797
1 vote

How can I make two hearts work?

It's easy to get two hearts working together: you just need to create a 3 way junction in your hearts input veins and arteries and where blood is pumped into the lungs and body, have both blood ...
hitbong.hitwife21's user avatar
1 vote

Debris protection for spiracle-like breathing holes, except 'nose' hair

As far as I know, the spiracles of most insects are also surrounded and covered by very very fine hair. Alternatively, it could be covered by a natural membrane or mucus like Gore-Tex, which is ...
MarsMagnus's user avatar
1 vote

Combining a electrocyte and a muscle fibre

The problem with making a dual-purpose muscle/electric organ is that muscles and electric organs perform their tasks in similar ways, but with very different structural minutiae. Muscles work by ...
Monty Wild's user avatar
  • 59k
1 vote

What mechanism for the transmission of signals between neurons can be faster than our sodium-potassium?

Optical neurons and synapses. Bioluminescent neurons glow. That glow encodes information that travels through fiber optic synapses. Lots of biological structures have optical properties. Different ...
Vladimir Silver's user avatar

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