i don't think age matter because they could be someone that's about 10 but have really big lungs and someone about 50 that's small for they're age. the bigger your lungs are the longer you can hold your breath for.
yes
Age will affect your sense of smell, taste and hearing. Age will decrease sensitivity of senses.
maternal age
It shouldn't
The weather, the age, the gender and nail biting are some of the factors that affect the growth of the nail plate.
Yes
Breath In, Breath Out In and Out
Yes but we will still die if we hold our breath and breathing is how we age and die
As people age and smoke, it is more difficult to breath.
No only how big your lungs are
You may get one more small growth spurt, which should include your penis, but don't hold your breath.
The average person can hold there breath for about 30 to 40 seconds, not that long uh. But some people mainly free divers who have been diving for a long period of time their lungs and heart have expanded and got used to holding their breath for longer times. There was a case in NYC which a man for the Guinness Records held his breath for 15 minutes.
60 years
Alcohol in breath dissipates quickly but not in urine, where it can be detected for about three days.
They would be able to survive for some time, probably 8-9 minutes without becoming unconcious. They will not breath in the water as when all animals(that includes humans) are underwater, we have a natural instinct to hold our breath, we dont need to "learn" how to hold our breath, if we needed to learn then we would all drown in our mothers womb. Adults are more likely to drown than babies because adults pannic and gag underwater, causing them to choke and cough, which in turn causes them to start breathing water. babies have no such sence of pannic at a new born age.
Many factors come in to play, such as the age and size of the animal. A baby with underdeveloped lungs surely can't hold it's breath for as long as a matured specimen. Water temperature is also a factor. It is not too out of the ordinary to observe a boa swimming underwater for several minutes at a time on just a leisurely swim, and they have been known to stay under for 20-30 minutes during mite infestations in an attempt to drown the parasites.
*CORRECTION TO PREVIOUS ANSWER A baby CAN hold its breath under water, but only up to a certain point. It's called mammalian diving reflex. New born babies have this reflex, and will hold their breath and open their eyes under water - though I admit I do not know for what length of time. There are even classes that encourage such "swimming" with parent/newborn teams to try and instill a love of swimming at such a very young age.
I don't think theres an age long as they've got a lifevest and you keep hold of them...