0
The thumb also has three joints, but the Proximal joint is farther up, embeded and mostly concealed in its muscles. That third [base joint] is what allows you to move the thumb to the left or right. NO. If you consider the thumb to have three joints you must be including the carpometacarpal joint which is (as far as i remember) a double saddle synnovial joint. This is the joint that joints the bone of the thumb that is concealed in the hand to the bones of the wrist. Within the visible thumb there is only two joints, the first being between the metacarpal and the proximal phalanx and the second being between the proximal and dislat phalanges. The other digits have and extra bone in the middle of these phalanges called the middle phalanx, giving it a third joint in the visible digit, or if you are including carpometacarpal joints as the original answer does with the thumb then you must do so for the fingers also which means they would have 4 joints each. And to answer the question the presence of a third joint in the thumb is simply unnecessary thanks the range of movement. The other digits require the extra joint so that the tips can come to meat close to the base of the visible digits so that before thumbs had evolvfed we could grasp small thin objects. The thumb has such a range of movement that this extra joint would be more effort to supply than its worth.
What else can I help you with?
Is your thumb as long as your nose?
Yes, your ear is the same size as your nose... They have the same growth speed also, they are the same length.
Why is your thumb called opposable?
The thumb on the human hand has only two phalanges, or joints, whereas human fingers each have 3 phalanges. This give the thumb greater movement and enables it to do things the fingers can't do. Collectively the fingers and thumbs are known as digits. The thumb is said to be opposable to the fingers. By definition, the thumb is both a finger and not a finger. "Finger" can mean any of the four digits besides the thumb OR any digit including the thumb. It is up to the person to decide whether or not the thumb is considered a finger.
Why nut can go into the right main bronchus instead of left main bronchus?
The right main bronchus, about 2.5 cm in length, is shorter, wider, and more nearly vertical than the left. Because it is in almost a direct line with the trachea--> foreign objects traversing the trachea are more likely to enter the right main bronchus.
Do thumbs count as fingers?
By definition, yes the thumb counts as a finger. That definition being: any one of the five digits, especially the four other than the thumb. The thumb is merely the only finger to possess abnormal qualities in comparison to the other four fingers. Finger is also a general term where thumb is the specific. If a person is pure German then they are also pure white, however a pure white person is not necessarily pure German. The digit is a thumb therefore it is also a finger, the digit being a finger does not have to be solely a thumb, or an index finger, or even a pinky.
What is the shorter lateral bone of the forearm?
The 'Ulna'. It's your 'funny bone' bone, more or less.
Are your thumbs different sizes?
yes, my left thumb is shorter than my right thumb and has a small nail
What is an organ that is wider but shorter tube than the small intestine?
Large intestine.
What size is a California king?
it is wider than a normal king bed, but shorter in length!:)
Is your thumb as long as your nose?
Yes, your ear is the same size as your nose... They have the same growth speed also, they are the same length.
Is the newspaper le monde printed in tabloid format?
No, it's in Berliner format, which is narrower and shorter than broadsheet, but taller and wider than tabloid.
What is the rule of thumb law in Alabama?
The rule of thumb law in Alabama is an old law that used to allow a man to beat his wife with a stick as long as it was no wider than his thumb. However, it is important to note that this law is no longer in effect and has been abolished.
What is Equalizing effect of erections?
Shorter and narrower flaccid penises gain more in length and circumference than do longer and wider penises.
Why is the thumb not used for taking a patients pulse?
the thumb's tip is in a awkward position than the other fingertips.
What is a cylinder with 1 base wider than the other?
cone
Name an object shorter than a decimeter?
eraser
What is the shorter of two intestines in human body?
The large intestine in humans is much shorter (by a factor of around 4) than the small intestine, though it's wider (hence "large").
How much wider is the moon than the earth?
The moon is not wider than the earth. Therefore, it can not be much wider than the earth.
