Several factors influence the appearance of satellite spatter, including the blood drop volume, freshness of blood, surface texture, and distance of the vertical target from the impact site.
What factors affect cell division? list 6 internal and external factors which can affect or control the rate of cell division.

What factors influence the blood spatter pattern?

The appearance of these blood patterns is affected by the forcefulness of the impact, the volume of blood impacted, the surface characteristics of the blood source, the characteristics of the surface the blood is deposited on, and what is impacting into the blood to put it in flight (Fig.

What are some factors that could affect bloodstain patterns or make them difficult to interpret?

  • Many factors, including the speed of a bullet, the distance blood spatter travels, and the type of surface it lands on, affect the number, size, location, and distribution of the droplets that make up a bloodstain. …
  • The Attinger lab’s experimental setup for collecting blood spatter.
What is one factor that blood spatter patterns Cannot indicate?

Too much blood can disguise spatter or make stain patterns unrecognizable. Conversely, too little blood, just one or two drops, will likely yield little or no useable information.

How does force affect blood spatter?

Blunt force injuries (hitting or beating) – objects inflicting this type of injury are usually larger, such as a bat or hammer. If the object impacts liquid blood, the larger surface area will collect more blood, producing drops of varying sizes.

What causes low impact blood spatter?

A low velocity spatter is usually four to eight millimeters in size and is often a result of dripping blood after a victim sustains an injury such as a stab or in some cases a punch. For example, if a victim is stabbed and then walks around bleeding, the drops of blood that are left behind are low velocity.

How Does height affect blood splatter?

The height from which the blood falls will affect the size of the stain, with greater heights tending to result in larger bloodstains. … A greater force will typically produce smaller droplets, with the density of blood drops decreasing moving further away from the initial blood source.

What does bloodstain pattern determine?

Bloodstain pattern analysis is the use of the bloodstain size, shape, and distribution patterns found at a crime scene in order to determine the bloodshed event(s). Bloodstain patterns reveal not “who” but “what and how” with regard to the bloodshed event.

What are the 3 things that blood spatter can tell us?

Analysis of a spatter pattern can aid in determining the: • direction blood traveled. angle of impact. point of origin of the blood. velocity of the blood.

What are 6 factors that affect blood flow?

The variables affecting blood flow and blood pressure in the systemic circulation are cardiac output, compliance, blood volume, blood viscosity, and the length and diameter of the blood vessels.

What causes the force that pushes blood through your body?

The force is generated with each heartbeat as blood is pumped from the heart into the blood vessels. The size and elasticity of the artery walls also affect blood pressure. Each time the heart beats (contracts and relaxes), pressure is created inside the arteries.

Why does blood spatter have a certain shape?

The spherical shape is caused by the surface tension of the blood. Surface Tension causes the blood drop to pull itself in; both horizontally and vertically. The blood drop will settle into a spherical shape, as a result of the surface tension.

How does height and angle affect blood spatter?

The first hypothesis that the higher the blood is dropped from, the bigger the spatter it will create is correct. Since there is more time due to the greater height there is more impact from gravity pulling the drop down which makes the drop gather more speed so it hits the surface with more force.

What type of blood patterns result from contact?

Transfer Stain – A bloodstain resulting from contact between a blood-bearing surface and another surface. Void – An absence of blood in an otherwise continuous bloodstain or bloodstain pattern.

What factors affect blood?

  • Cardiac output.
  • Peripheral vascular resistance.
  • Volume of circulating blood.
  • Viscosity of blood.
  • Elasticity of vessels walls.
What are five factors that affect blood flow?

  • Cardiac output.
  • Compliance.
  • Volume of the blood.
  • Viscosity of the blood.
  • Blood vessel length and diameter.
What are the 3 primary factors that influence blood pressure and blood flow?

The three factors that contribute to blood pressure are resistance, blood viscosity, and blood vessel diameter. Resistance in peripheral circulation is used as a measure of this factor. The longer the vessel, the greater the resistance. Blood viscosity tells you how thick your blood is.

What factors affect the speed of blood flow?

The rate, or velocity, of blood flow varies inversely with the total cross-sectional area of the blood vessels. As the total cross-sectional area of the vessels increases, the velocity of flow decreases. Blood flow is slowest in the capillaries, which allows time for exchange of gases and nutrients.

How does blood flow upwards?

Blood must flow upward throughout your body to make it back to the heart – working against gravity. Your calf and leg muscles help push that blood upward, while valves (small flaps located inside the vein), open up and allow blood to pass through. Valves close as blood passes through to keep it from flowing back down.

What force pushes blood through veins?

Blood primarily moves in the veins by the rhythmic movement of smooth muscle in the vessel wall and by the action of the skeletal muscle as the body moves. Because most veins must move blood against the pull of gravity, blood is prevented from flowing backward in the veins by one-way valves.

What causes blood to return to the heart?

Oxygen-poor blood returns from the body to the heart through the superior vena cava (SVC) and inferior vena cava (IVC), the two main veins that bring blood back to the heart. The oxygen-poor blood enters the right atrium (RA), or the right upper chamber of the heart.

How are blood spatter patterns created?

When force (an impact) is applied on a source of liquid blood, an impact pattern is created around this event. The ‘angle of impact’ is the acute angle formed between the direction of a blood drop and the plane of the surface it strikes. After the impact the resulting blood droplets move through the air like a sphere.

How does the angle of impact affect the shape of blood spatter quizlet?

How does the angle of impact influence the resulting blood stain? If it drops from straight up and down the drop will be a circle. If it drops from an angle the blood stain will make a ellipse which we can calculate the angle.

Does temperature affect blood spatter?

In synopsis, the present study shows that ambient temperature is a major determinant of the drying process of blood droplets and should always be documented accurately and continuously on a crime scene.