How is body weight distributed between bones, organs, muscle and fat?
Approximate body weight distribution for a lean adult:Bone: men 15%; women 10%Muscle: men 45%; women 37%Organs: men and women: 25%Fat: men 15%; women 28%Source: Advanced Human Nutrition (p. 198)Few facts:Your bone thickness and thus bone weight is genetically determined, so, in a healthy person it does not change considerably with muscle or fat gain or loss.The amount of muscle mass in healthy untrained individuals is largerly genetically determined. You should not expect to increase your muscle mass by eating more food or more protein without training.The scope of muscle gain with training is limited by your genetics.During weight loss (calorie-deficient diet) you lose both body fat mass and muscle mass. At the start of weight loss you lose mainly fat, but by continuing losing fat, the percent of your muscle loss will start to increase.
(Bone Questions) Which of the following bones is part of the appendicular system?
1. Which of the following bones is part of the appendicular system? A) skull B) sternum C) Clavicle D) rib 2. A bone we use to grind our food is called the? A) fibula B) molar C) innonminate D) mandible 3. Which of the following is NOT an arm bone? A) scapula B) humerus C) radius D) ulna 4. Both finger and toe bones are known as? A) tarsals B) phalanges C) carpals D) metatarsals 5. The muscle that surrounds blood vessels is called? A) smooth muscle B) vascular muscle C) skeletal muscle D) cardiac muscle 6. What bone produces that huge hump on bison and why? A) the scapula – for running B) vertebrae – for running C) vertebrae – for holding up the head D) the pelvis – for running 7. Which of the following is a correct statement regarding two muscles, where muscle A is much longer than muscle B? A) Muscle A generates a greater force than muscle B because A is longer. B) Muscle B generates a greater force than muscle A because the length of A makes it more delicate. C) You can't tell – it depends on the particular muscles involved and where they attach on bones. D) Muscle A and B are capable of generating an equal force because the length of a muscle does not greatly influence its strength. 8. Which muscle produces a greater force, the gastrocnemius or the tibialis anterior? A) They oppose each other so they must have equal strength. B) It depends on the individual C) gastrocnemius D) tibialis anterior
Which is the weakest bone in our body?
It is important to understand bone anatomy in this case. The strength and/or weakness of a bone is determined by a multitude of factors from genetics to diet (when I say “diet” I mean from a breastfeeding age onward).There are 2 types of bone in the human body, compact bone and spongy bone (often called trabecular bone). They are designed differently and reside in different places on your bone:As you can see in this femur (bone spanning from the hip to the knee) the compact bone is present in the shaft and of course, it is very compact. However, this compact bone is only very resistant to force/pressure applied if it is applied from above pressing down, or from below pressing up. This is one of the major reasons the femur is able to hold our body weight. On the other hand, if force is applied from the sides it will collapse, like a toothpick, try breaking it from above or below but when you break it from the sides, it buckles.Now, soft bone or trabecular bone is obviously less dense as shown in the diagram, there are spaces. But this is very cleverly designed (engineers will understand this as they may have come across it before),The way the trabecular bone is designed, is to channel all of the force applied from above inwards and directly to the compact bone.So coming back to your question,“What is the weakest bone in our body?”Well, I hope you have understood that our bones have ‘strong’ and ‘weak’ components but they all act as strengths of their individual bone anatomy. So it really depends on genes + diet + what position the bone is in our body and where the force is applied.Small doesn’t mean weak as we could have small but compact bones (like in our feet).For example, the collar bone people have been banging on about, The collar bone (clavicle) is like the femur but lies in a different plane, instead of vertical, its horizontal. And notice how people break their clavicle (like my friend in rugby) its pretty much always from a force applied from the front going through you and this is through the compact bone at the perpendicular angle at which it buckles. (PLEASE CORRECT ME IF I AM WRONG)So in summary, your question is too broad for there to be a specified answer, as you have to take into account genetics, diet/ nutrition, location in bod, angle of force applied.I hope you have understood and I hope I have explained well- good question by the way.Stay blessed.
What are some mind-blowing amazing facts about the human body?
It is impossible to tickle yourself.Everyone has a unique smell.Your left lung is smaller than your right lung to make room for your heart.A person would die quicker from a total lack of sleep than from hunger. Death would occur after ten days without sleep, whereas from hunger it would take several weeks.Within three days of dying, the enzymes that digested a person’s food will begin to digest that person’s body.The resolution of the human eye is estimated to be around 500 megapixels.Most men have erections during sleep.Women are born with better sense of smell than men.The rate at which a person’s hair grows doubles during an airplane flight.Human beings are the only living things which sleep on their backs.A human’s ears and nose never stop growing.A human makes approximately 20,000 breaths per day.If you were locked in a completely sealed room, you would not die due to a lack of air, but from carbon dioxide poisoning.According to German researchers, the risk of having heart attack is higher on Monday than on any other day of the week.A human eye can distinguish up to 10 million different colors. But our brain can’t remember all of them.The heart beats 35 million times a year. Yes, 35 million. A year!Boys have fewer taste buds on the surface of their tongues than girls do.Smiling triggers 17 muscles of the face while crying activates 43. So smile more!The liver is largest internal organ and is the only organ that can regenerate itself. However, repeated damage to the liver can eventually injure and scar this amazing organ.The longest bone in an adult human is the thighbone, measuring about 18 inches (46 cm). The shortest bone is in the ear and is just 0.1 inches (.25 cm) long, which is shorter than a grain of rice.Like fingerprints, each human tongue has its own unique print.Fingernails grow about four times faster than your toenails.In a lifetime, a human body will process about 100,000 pounds of food.Humans spend about five years of their lives eating.A human heart beats over 3 billion times during an average human lifespan.Facial hair grows faster than any other hair on the body.Women’s hearts beat faster than men’s.A human head remains conscious for about 15 to 20 seconds after it has been decapitated.Women burn fat more slowly than men, by a rate of about 50 calories a dayThe indentation in the middle of the area between the nose and the upper lip is called the philtrum. Scientists have yet to figure out what purpose this indentation serves.
Which statement correctly describes the human muscular system?
1). a - the smooth and cardiac muscles operate involuntarily "Smooth muscle or "involuntary muscle" is found within the walls of organs and structures such as the esophagus, stomach, intestines, bronchi, uterus, urethra, bladder, blood vessels, and even the skin (in which it controls erection of body hair). Unlike skeletal muscle, smooth muscle is not under conscious control. Cardiac muscle is also an "involuntary muscle" but is more akin in structure to skeletal muscle, and is found only in the heart. " 2) c. Muscles can only contract, not push "Muscle fiber generates tension through the action of actin and myosin cross-bridge cycling. While under tension, the muscle may lengthen, shorten or remain the same. Though the term 'contraction' implies shortening, when referring to the muscular system it means muscle fibers generating tension with the help of motor neurons (the terms twitch tension, twitch force and fiber contraction are also used)."
What is the longest bone in the body?
The longest bone in the human body is the FEMUR. It is the bone of thighThe Smallest bone in the human body is the stapes or stirrup bone, located inside the ear. It is about 3 mm long.Largest artery is the Aorta .Largest vein is the Inferior vena cava.Largest internal organ is the liver. It is also the heaviest organ, with an average of 1.6 kilograms (3.5 pounds).
Does the body shrink during death?
An unembalmed body will eventually shrink (depending on the environment the body is in). This usually would start a few days after death, and it isn't pretty. An embalmed body wouldn't really shrink. The blood is removed during the process and embalming fluid is sent through the arterial system, pushing the fluid to the cells of the body. This makes the body somewhat rigid (not anywhere near like concrete, as someone else wrote). The general shape and size of the body remain unchanged. As for why the casket was smaller than his body, I couldn't answer as that is not a normal occurrence and I've never seen it. You can ask his family and/or the funeral director - they may have an answer for you.